Does it look like i could have an std or what’s wrong with me!!!.

I have recently the past few months started having sex and theres something odd going on down there. The day after or few days following sex my vagina gets itchy and almost sort of dry and i have started recently having flakey scabs down there and pimples forming. Im so scared that it could be an std or infection. I also think it may be from receiving head very often and maybe the saliva is why im dry and itchy. sorry for the tmi but please help!!!

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Skin looks a bit irritated, has it changed over time?