Hoping/Praying for a miracle.

According to my calculations, I'm about 5 weeks, 5 days pregnant. Last Friday, I started feeling sick to my stomach, had diarrhea (tmi, sorry) after a couple hours of stomach cramps. I went to bed, got up on Saturday, as I was getting my older kids in the car, I started cramping pretty bad. I freaked out and went to the ER. They drew blood and did an ultrasound. HCG level was in the 1600's (which is good) and ultrasound showed the sac but it was still too early to see/hear anything as I was barely 5 weeks along. They diagnosed it as a "threatened miscarriage" and sent me on my way. As Saturday went on, it felt more and more like extreme constipation (passing VERY hard small stools) and could not pass gas that I could feel rolling around in my stomach. I got blood drawn at the lab my doctor sent me to on the following Monday. When the nurse called she said my hcg looked fine (yay!) then when she told

me what it was I knew it wasn't good. She said they were in the 1200's. They were 1600 on Saturday? She said that my progesterone level was a little low and that she was going to call me in a prescription for some. I have had minimal cramping and the only time I've had spotting is when I strain to have a bowel movement (something I've noticed even before getting pregnant and after getting my mirena removed). I know this is a novel (sorry) but, I'm wondering if anyone has been through this? I went back for another blood test this morning and will get the results from it tomorrow morning. I've been a MESS. Thanks in advance for your input!