kinda freaked out now...

okay, I had a natural misscarriage on Dec 23rd. I was 7-8 weeks along. I bled for approx 12 days and then stopped. I had no complications, feel fine other than a lot of cramps and stuff like im going to start my period any day but still haven't. My Dr told us it would be best to wait to start trying again until after my first cycle. well my husband was gone this weekend and when he came home it was his birthday and obviously it had been a while so I said to hell with it and we had sex (not TRYING just actually felt like making love to my husband) well now I'm all freaked out that I could get pregnant from it and that wasn't the goal so soon after losing our last and worried that if that were to happen my body wouldn't be healed yet and id just miscarry again :( has anyone else gone thru this? gotten pregnant or not? someone ease my mind please