Ok first of all i'm really stressed and nervous and so is my girlfriend we had protected sex and i pulled out before i ejaculated and there were no issues with the condom. today marking her 4 days of missing her period what are the possibilities?

Normally regular women occasionally miss a cycle or two when they are not pregnant. The pull-out method is of little value, but condom use is quite effective in preventing pregnancy if applied before any intercourse. If the delay is due to pregnancy a urine pregnancy test is likely positive.

When used correctly, condoms are 98% effective in preventing pregnancy. There are many other reasons for her period to be delayed. After she is seven days late have her take a pregnancy test.