Hi Jordie
I'm no expert but I think m/c can cause havoc with your cycles for a few months, not just the first one. I'm having the same problem at the moment with wacky cycles cause by b/f so I know how you feel in that respect. Also with my m/c I seem to recall the first 3 or so AF's after were a bit different and varied in length.
I really hope you get your bfp soon!
Good luck!