Clarification

Okay I lost my virginity at age 18 ,well three months ago ..my question is does your vagina go back to its right size after your first time..take in I never had sex before. its been four months now..i show no signs of infection just want to know if everything is okay. I'm also a bit insecure about my body because I found out he was in a relationship before me and he told the following week he took my virginity. Any advice?