I get slight AF type cramps, very mildly, around "O" time and they usually go for a couple of days and I think they happen just before "O" day and during "O" day. I don't get alot of EWCM like everyone talks about so besides the pains, i wouldn't even know if I O'd! I also get slight nausea for a day and very tired... then it goes! I also get that 'heavy' feeling of pressure in my abdomen too!

I think you are in with a great chance if you just dtd last night, you might be in with a chance of a boy!! that's if you already had O'd.... Goodluck!