I found the breast pain to be an ache in both breasts at the beginning of both of my pregnancies. When I'd take my bra off at night they'd really be throbbing, it was such a relief to take it off!!

I agree with Delphmoon, I'd be popping to the Dr just to make sure everything is ok with the implants. Better to be safe than sorry.

Oh and just remember BFP's don't always appear until after AF is due... I tested before AF was due this time and got a BFN, it wasn't until the day I was due for AF that the extra line appeared, so don't be put off just yet.