+ Wondfo, - FRER?

AF was due today and was a no show. I took a wondfo when I got home from work after a pretty decently long hold. My wondfo from this morning was negative but I've been thinking I'm seeing a ghost of a line. Well, there was definitely a line this afternoon! I waited a while and went to buy some FRER, and it's a BFN... granted, I couldn't wait to test so hardly any hold. Also, the control line is squiggly on the FRER. I'm taking the other tomorrow morning, but could I be having a chemical or something?