Sex during your fertile window is risky, especially with no condom. Guys tend to pull out at the last possible moment, and just because you saw evidence on your belly does not mean some was not spilled inside. Even so You may be psyching yourself into some early signs. Watch for more early signs and run a test if your period is several days late.
Hello. Well, the pull out method isn't birth control. I hate to tell you that as I hate to add to your anxiety. But it didn't prevent pregnancy by his pulling out. However, it made it 'less' likely and the stars and moon need to line up for pregnancy to occur. At 2.5 weeks after the intercourse that was unprotected, if you don't get your period, take a test as it will be accurate from that point on. Get some condoms for any sex in the future! You get them and make sure he puts them on or get on the pill. Protect yourself!