Alligator, I hope this is your bfp, but if it isn't and AF is starting, I think you have the right attitude.
We tried immediately after my MC as well, even though we were supposed to wait until after one AF. I obviously hoped to conceive again immediately, but also looked at it as a bonus round. If it happened great, but if not, at least the mc would be behind me and I could move on. My tests ended up fluctuating a lot so I did wonder about a new pregnancy. In fact some people in this group thought I might be pregnant again. My tests hadn't gone fully negative at that point though so I didn't get my hopes up. By the time AF came I was actually very relieved. I didn't know whether or not I had ovulated and if I had I wouldn't have known when (I had a bunch of very positive looking OPKs from different days that confused me). I didn't know if I was pregnant so being careful just in case. It was frustrating. Once AF showed I just felt a wave of relief hit me because I knew for the first time in months exactly what was going on with my body and knew I could start fresh.
So, I'm not sure what I'm trying to say exactly. Maybe just hope for the best (bfp), but don't feel bad if you feel relieved if AF shows. Either way, you get to move on and that is a good thing.