something weird

Okay so something weird is going on down there. I know it's not an STI. It's like all itchy and irritable and it hurts a little when I pee. Now out first I thought it was a UTI because that's something I hear a lot, but when I was looking into it online it seemed like most people experience a lot more pain than I am. Like it's only a little bit uncomfortable when I pee and that's it as far as pain goes. Please help meeeee... does anyone know what could be causing this or how I could fix it? I am sexually active and I just got off my period a couple of days ago.