12dpo...af due Sunday!

So I'm 12 dpo, af is due Sunday and I'm really hoping she doesn't come! My friend and I were talking today and I said how my breasts have been sore, my left nipple is constantly hard (they're NEVER hard) and my nipples are just really sensitive. I also had an awful migraine Wednesday into Thursday...I get them sometimes during my period, but almost never before and never this bad.

For the past almost 2 weeks I've been really good about not attributing every little thing to possible pregnancy symptoms but now I just REALLY wanna test! Not sure what to do...thinking of maybe testing tomorrow morning even though I know I should wait until af is late...

Any suggestions as to what I should do or how I should avoid testing? Or anyone had similar symptoms and gotten their bfp, especially the nipple?