HELP!

Ok ladies-

I'm CD 31. Predicted AF should be in 2 days based on averages done by the app, but my last two cycles were 43 then 38 days long. Based on my charts I think I ovulated on CD 18.

I don't know, I just feel pregnant. Had some mild nausea, hot flashes, pinchy pain in my pelvic area, some tingly pain and maybe fullness of my boobs... I'm fully aware that I could be dreaming this up or PMS.

Had a BFN with a drugstore brand test on Monday.

When should I test again?! I went and got some First Response early results tests. HELP me!