dumb question

Hello everyone I know it is a silly question and I keep telling this to myself also but still he got wet on my chest and stomach and I didn't take off my pants at all but still I'm scared I'm married have four beautiful kids but I'm just scared of any contraception or pills I just am scared because I dont want to get pregnant  I'm just tired I love my kids my elder one fifteen I just want to see them grow up beautifully im 36 but is there any of getting pregnant I know it is Silly question but still if any of u could calm me down or scold me