Vagina help

I've grown up in a very Conservative town with a Conservative family so no one has ever really educated me on my body or vagina so I've now had a bit of a persistent itch for the last couple of days, it doesnt hurt and I've tried to have a look to see if anything is going on but I don't even know what I'm supposed to be looking at, what's normal? What's not? Something doesn't seem right but I'm just not sure if I've not noticed it before? I'm getting really worried, initially I thought I'd maybe nipped myself shaving so it was just a healing cut that was in a sensitive area but I'm now scared there's something more wrong. I did have sex the other day but he didn't have any stds but now I'm worried that maybe he did and just didn't know or didn't tell me but even that I haven't a clue what I'm looking for... Any advice or suggestions would be great, I'm having a meltdown 😭