You do have a good chance of becoming pregnant but take a pregnancy test in a week or so to be accurate .
Depends on the woman.
Women are most fertile in the 2 days before ovulation and up to 24 hours after. I hope you were trying to become pregnant, because if not your timing sucks.
I've got you covered, http://www.masterbation-forum.com
Idk I think it may be ovulation. Bc when the egg is fertilized it takes about 6-12 day to be implantes inside the uterus. This causes cramps and some spotting. I think you are fine, but keep a check on your symptoms ans look for spotting. I personally think you are not pregnant bc you wouldn't get cramping that fast.