Possible miscarriage?

I found out yesterday I was pregnant. I have been pregnant one other time, exactly a year ago this month and it ended in mc the following August. Today, my husband and I had sex. He ejaculated inside me and when we were done he said there was blood. I freaked. Went to the bathroom and felt something "drop" out of me. It was light pink and I assumed it to be tissue. Could it have been my spotting along with his ejaculate instead? I've been spotting off and on over the course of a few days, very very minimal. Early this morning when I peed, there was some discharge-y brown blood. Then this happened this evening. Please someone help. I'm terrified.