Heart broken..

My emotions are just all over the place right now.. So I've always had irregular cycles, most recently they have been 42 days apart. Well my period was due 11/5 and it didn't come so I took two tests and got a negative. But something just felt different, in a sense I knew I was pregnant. After a week I took another test and got a faint positive. The best day I had three positives and a digital that said I was 1-2 weeks past ovulation. I was over the moon. I also had what I assume we're implantation cramps last week. I called the OBGYN to make an appointment to check on how baby was doing and to see how far along I was. Well my last period was Sept. 24th so they assumed I was about 8 weeks pregnant this week. I knew I wasn't that far but figured I would make sure everything's fine.. I went in with my husband to the ultrasound and my heart dropped. They saw nothing but a very tiny black speck which "could be" the start of something. He also asked if I had bled recently fearing a miscarriage. Which I haven't bled since my period. I'm just a mess because I truly still think I am pregnant and believe it's just to early but at the same time know I'm doubting it.. I had a blood test and have to go in for another to make sure my levels are going up to make sure I didn't lose it.. I just feel heart broken and my husband was so excited. We both just sat in the parking lot crying for 30 minutes.. I just don't know how to tell myself everything is going to be ok. I still want to believe my baby is still with me...