Really getting annoyed now!?

I don't know if I am pregnant :/ last month my period was 4-5 days late and it wasn't exactly spotting but it lasted for 5 days first day was spotty second day was slightly heavier and the last few days were dragging out with slightly heavier than scanty spotting. I've had alot of egg White cm which isn't quite stretchy (if that's what it's supposed to be) my are sore every now and again and this morning they were really sensitive but not in an unpleasant way. Those 5 days of waiting for my period I had 3 tests each one negative I'm just really confused cause my periods are like clockwork