If you are not preg, then it sounds like stress is throwing your cycles off.
I was only TTC for one month (but will be jumping back in a few weeks bc of miscarriage) but did TONS of research and found that stress can effect alot of things, including your cycles. The month I TTCed, I bought the little strips and did all that stuff, but we ended up BDing 10 days in a row and so testing and junk wasnt even worth it. We were successful by the way, so just BD from day 8 or so to day 16 (change the days depending on your cycle length, just make sure to do it move before ovulation than after)....then you dont have to stress you can just live and then come home at night and "do the do", and BAM get preg!...hehe.
I hope your cycles make sense soon!