Pregnancy of Unknown Location and Bleeding for 2 Weeks!?!?!?!!

This seems to have been the worst 2 weeks of my life although it should be some of the best moments of my life. My husband and I have been together for 12 years and married for five. It has been a real struggle to get pregnant. My daughter now is 21, I had her when I was only 16 so I didn't get a chance to just enjoy it and embrace my pregnancy. Now my daughter is in college and my husband and I for the last five years since we've been married have been trying to have a baby. I have had so many obstacles in my way I was diagnosed with PCOS, I have also been diagnosed with adenomyosis, and fertility has been a big problem for us. My periods have always been a little out of whack but within the last 2 and 1/2 years they have been pretty regular because I was put on birth control pills for like 3 months and after that they became regular. Okay I'm about to fast forward now. I had started seeing a new family doctor and told her about the PCOS and the struggles that me and my husband had been having. I told her that I finally started having regular periods about 2 years ago and that I was charting my ovulation but I was never ovulating. She prescribed me metformin. I started taking the metformin August 25th I came on my period on August 28th and stayed on my period until September 2nd. I finally ovulated after 5 years on September 19th!!! So based on my last menstrual period in August I was supposed to come on my cycle again October 3rd. I did not come on October 3rd so I was a day late and I end up having some real dark brown spotting on October 4th and 5th. After October 5th I started bleeding and it seemed like a cycle so I did not think that I was actually pregnant. My husband started throwing up feeling bad for a whole week at work from October 6th until the next week. Something told me to take a pregnancy test while I was bleeding and I did and it came out to be positive! I was so excited although I was bleeding so I immediately made an appointment with my family doctor and she took my blood work and I told her I was spotting. When I went back to her in 2 days my HCG level was 647. I told her that I was still doing some mild bleeding so she recommended that I go to the emergency room. I went to the emergency room and they gave me an ultrasound but didn't see anything in my tubes and did not see anything in my uterus but my HCG level went up to 997.I went to the emergency room on a Friday so over that weekend I was upset because the doctor there told me that it could be that I was very early and they didn't see the baby or either a possible miscarriage. So this Monday I went to another doctor that my doctor recommended me to which was an OBGYN and she did not give me any blood work at all. She just referred me to a ultrasound radiation doctor to give me an ultrasound. The next day I went to get the ultrasound done and they still didn't see anything in my tubes or my uterus and they also gave me a transvaginal ultrasound and they found nothing. Today I went to my new OBGYN and she ordered some blood testing and told me from the ultrasound results that I had a pregnancy of an unknown location and she was going to get to the bottom of this. She said it could be implantation bleeding but concerned by me bleeding for 2 weeks straight but the bleeding has been on and off light to mild with a few small clots. She also said that it could be decidual bleeding because by me having PCOS that my hormone level might not be enough to stop my uterus from shedding and lining. She gave me another blood test and told me that she would call me back on this upcoming Monday and if my levels have risen that she wants me to get another ultrasound and see if they can find the baby. She also says that if my levels dont rise that she wants me to come in that week to take another test and look at it as a possible miscarriage. My concern is that they are going based off of my last menstrual period, which would make me a little over 7 weeks but if I go based off the time that I actually ovulated and I know when I ovulated I would be just a bit over 4 weeks which could be the reason they're not seeing the baby. I am so so sorry about this long post I wanted to make sure that I didn't leave anything out because I'm so scared I'm so disappointed and I know that I am putting too much stress on myself like my husband said. Has anybody went through the same thing and went on to have a healthy pregnancy and a healthy baby any enlightening please, thank you.