Could I be pregnant?

I just wonder if it's all in my head but AF doesn't start til Tuesday and ever since a couple days after ovulation I've had really sore breasts (no tingling), a couple headaches and stuffiness, seems like more discharge, tired but I'm not sure if it's just my normal tired or not and I've been waking up the past 3 days and cannot sleep which is unheard of for me. I have sore breasts before AF but never that early. I've also cramped a little after ovulation.