luac on "Hysteroscopy, BCPs and AF Question"

I had a hysteroscopy last month - one week prior to the procedure I was put on BCPs for one week to thin my lining so the RE was able to remove the polyps w/out obstacles. It's now been one month since the procedure - I am eagerly awaiting AF so I can get started cycling for my first IVF.
I've been spotting lightly since Friday afternoon, but with no AF in sight. Boobs are sore on and off and the cramps are on and off as well. I finally gave in and tested this morning - BFN.
So, has anyone else had this experience with bcps, or any of the above mentioned situation? I've never ever ever spotted before or between AF until now. It's probably not such a big deal, AF will come just as she always does, but I always freak out a bit when my body does not behave as normal....and I'm anxious to get this IVF cycle underway..
Thoughts? TIA