I don't know if it is 'normal' but I don't cramp when I have AF - leading up to AF I do but not during. I sometimes feel 'wet' & then I check & AF shows up, although my flow is medium at most, not heavy/soaking through pads etc....

If it were me, I'd wait it out & see what happens for the rest of the time AF is here (unless bleeding does not stop at all) and then check again next cycle. I know after having DD, my cycles was different to pre-conception.

I hope it is nothing to worry about