Cramps.. 3-5 dpo..

I'm new to ttc this is our first month.. I know I ovulated 3 to 5 days ago due to ovulation discharge.. But I been crampy for 3 days with horrible headaches. Am I crazy or is there a reason for this. Ughh. I'm just hopeful that every symptom is a sign.. And believe me I know it's way to early.. I'm cycle day 15 and I have 13 days til my next expected period. But for the last two months I've started a day or two early so it could be 11-13 days til my next period. Anyone going through this?