Symptoms?

TTC for about 3 months now....
1 week after my period ended I spotted heavily for 4 days, and during this time, the opk told me I was at peak fertility. So hubs and I got after it! 
Now about a week later I have EXTREME cramping and while I was working out this morning I had deep, sharp muscle pains in my abdomen that I have never felt before. 
Has anyone experienced any of these symptoms as pregnancy?