confused?! AF or "breakthrough bleeding"?

Me
As you can see, my BBT rose today and I'm 2 days "late"... I started spotting, last night and have been spotting today and it's only enough to cover one side of a tampon (sorry tmi).
Well just now when I went to change it, assuming with cramps it's just AF despite the BBT, there was EWCM (A LOT) on it too! I'm always dry as can be CM wise when I'm on my period... also, when I wiped it was just a brown patch, but I plugged up again just in case. Cramps aren't as bad as usual AF but I don't wanna get my hopes up...
Has this ever happened to any of you ladies and led to a BFP?!
ANY INPUT IS APPRECIATED 😭