what is wrong with me ?!

For the 3rd time this month I'm telling glow that I haven't started my period on the day it's saying. I'm now 5 days past the day it said I should start and I swear every test has the faintest of lines. BUT I took two first responses and they looked negative. My nipples hurt and I'm exhausted. I get some cramping but nothing has come of it so far. No spotting or bleeding at all. My periods have been so irregular this past year of trying to conceive. I'm beyond frustrated. I've probably peed on 30 sticks in a week 🙄 when is it my turn ? 😩