Worries about Pregnancy/Period

Uh hey. So tonight I lost my virginity, which was a really good experience and it would’ve stayed that way if I didn’t overthink the consequences of it. Every time I’ve done anything remotely sexual, it usually comes back to bite me in the butt (Ex: First kisses were instant regrets most of the time, First time receiving oral - I got a yeast infection, etc. etc.) And recently my period has been extremely irregular because of my anxiety, depression, and diet changes so I don’t even remember the last time i had my period, therefore not being able to track my ovulation. The main reason why I’m so worried tho is because I had sex unprotected. He did pull out and I plan on buying a Plan B tomorrow (and like two extras on amazon) but can someone please reassure that I’m not gonna get pregnant or give me some advice because I’m starting to get really anxious about the situation.