Boobs ache but not a sore feeling like normal right before af...

According to my one app, I’m 2 days late and according to eve my period should start tomorrow. Around ovulation/fertile window of my current cycle, i spotted extremely lightly, only saw it when i wiped twice. My back is starting to ache a little more than usual. What’s weird is my boobs aren’t sore like normal, they actually ache which I’ve never experienced before. Is this a sign? This is my first month TTC. Also my nipples have veins going through them and I’ve been EXTREMELY tired. 3 hour naps on to of sleeping in kinda tired... could it be AF? Or pregnant? I took two tests but they were negative. Waiting a few more days to test again.