What to do??!!

So I'm on cd 36 and Iv taken tests and they are all negative!! The longest my cycle has gone is 33 days. My af symptoms are just like pregnancy symptoms except this month iv only had cramps and a headache here and there. My husband has said a few times that I'm being snippy but I feel I'm the happiest iv been in awhile. I'm so anxious to get a bfp but getting nervous that af is just messing with me!! I don't know what to do!!😤😤😩😩