Tired as can be and implantation or period?

So I've been through two rounds of clomid so far, I'll probably be starting tonight as if in normal schedule. But my cycles haven't always been normal until recently, then clomid seemed to start to short them. This time when AF came around, I don't remeber really having my usual systems (I'm usually a huge back ache getter) my face did break out but I've been so tired lately. Like put me down to rest tired. And while AF usually sticks around for 3-4 days she's heavier through it all. Well I started, had a light first day, then yesterday was a little medium and today, we'll nothing but very few spots early this morning. Implantation or not? Took a test this morning just because. Lol. Negative, but I expected as such.

Anyway, just wondering your ladies thoughts, suggestions. Thanks!