Pulling out is definitely not a good form of birth control hunnie.. wait until after (if) you miss your period. If you sit there and stress also it could cause your period to come late and give you false symptoms. I would suggest going to the health dpt and getting on some birth control so there's no more scares.
It wouldn't be unreasonable. You did have unprotected sex that could lead to pregnancy.
The pull out method is the wrong way to go because there is no guarantee... Wait to see if your period comes if not then you should test... is your period usually on time?