Hello, I have been TTC for almost three years. I have one blocked tube that did not get cleared when I had my HSG in 8/10. Started seeing an RE in 2/11. We did 5 failed iui's before moving onto ivf. I had my retrieval march 2nd and they did a day 5 transfer. They put two embryos in on march 7th, and we were lucky to be able to freeze 4. I am pregnant from the ivf with twins but have been spotting for a week. Today, it was actually fresh blood, went to the doctor, they still see the embryos, and we were able to hear the heartbeats but I am still worried. I am now getting a shot of progesterone from my husband every night. Has this happened to anyone? I am worried about miscarriage. I am 37 concerned. Anyone have advice?