 [ Symptoms ] does penicillin go in a mans semen sperm  my fiance has been taking penicillin vk 500mg for three days and we forgot and made love i have a sever reaction to penicillin should i be worried [ Disease ] if you do not start remembering to take your oral contraceptive on a regular basis and you do not insist that your boyfriend use a condom for extra pregnancy and std insurance then it will only be a matter of time before you become pregnant put your birth control pill with your toothbrush so you will remember