Insight Needed!

Okay so ever since my last period, my husband and I have had sex regularly, just about every other day. My last period ended on the 19th of may. For the past couple days, I have had a constant cramping on my left side and in the middle of my abdomen. Sometimes the cramps are extremely light other times they are kind of strong. We've been actively TTC since before my period started in may. I also am experiencing breast tenderness, fatigue, I've been extremely emotional, and I've been eating all the time. Has this happened to anyone else?!?