Hey chick, the dates on the scans can be abit wrong so the only way to tell is by DNA test. Tbh I know its hard but I think its only right you tell your partner and get a DNA test, i know you dont wanna lose him or hurt him, but if there is even the slightest chance that its not his he has a right to know. Im the first one to say anyone can be a father but it takes alot to be a daddy, but he has to be the one to decide what to do if the child is not his. You also have to think of the future, as I had a friend in a simular situation as you, and a few years down the line the person she had slept with (not her OH) had got solitors involved as he was insisting the child was his, and a DNA test of both men was taken and the other fella not her OH was the father and it was such a distressing time for all of them. Good luck chick and I hope it all works out haha xxx