My husband and I have been trying to get pregnant for a while now and I have been tracking my ovulation cycle using an app. According to my app, my ovulation day was Friday. My husband and I had sex on Monday night and Friday morning. All day Friday I had a dull cramping in my lower right abdomen and then when I put my 2 year old down for a nap in the middle of the afternoon, I also fell asleep. So subsequently, I was tired. My question is, is it possible to have symptoms that early? If the Monday's intercourse sperm attached It's self on Friday, my ovulation day, that is still the day of, and If it was the Friday's intercourse sperm, I felt symptoms hours later. 

Let me know if you have any insight on the matter. Thanks!