After 4 some years

After 4+ years I decide to have sex and it was with guy who was older,let's just say he wasn't the best. He wasn't small but wasn't big either. He proceed to give me head and it just felt weird like I had it before but it was like he didn't know what he was doing, so to get turned on I think about a whole different person and then boom he starts talking and ruins my mood. We kept going until I started faking it just so he could leave. So long story short no protection and I don't know if he ejaculated, How long would you wait to see if you got pregnant or std?