Really scared to be excited!

Hello fellow glow users! I have been trying to concieve for a year and a half, after the first 11 months of trying I stopped buyin pregnancy tests because I always got my period faithfully and we all know we had negative pts so...I'm about 28-29 days on a cycle. On the end of cd 27 I usually spot pink until mid day cd 28 and then my period comes fully (FAITHFULLY). This month I actually had ovulation spotting and my breast hurt way worts after I o'd than they normally do and my nipples and underarms hurt(very diff for me). And today which is cd 26 I woke up to some pink spotting around 9 this morning :((( but now at 12:30 the spotting has turned completely brown? Could this be implantation spotting/bleeding finally after all this time???