So, this is my first time ttc and according to fertility friend (my opks, cm, bbt etc.) I definitely ovulated on the 16th, I used a sperm donor (at home, I know the guy and I used a syringe/preseed etc.) and I've not really felt anything until today. I'm getting like a much milder form of period cramps (including back ache) is this normal and possibly a good sign? I always thought this would be too early, but this is very unusual for me as my period has always been like clockwork.