Shaving????

So like I hate when my hair starts to grow back down there and like especially around my ass because when it grows back it gets bumpy and razor burny and now thatsit's by my underwear line it chafes and I hate it! Also I was worried it was something worse but when I looked at it (only from picture because I can't bend my head that way lol) I see the hair follicle growing out of the little bumps so that's why I figured it was just my hair growing back. My question is I've heard a lot of things about stds or herpes or something and how sometimes it can be confused with pimples and stuff and I've only had sex with one guy who I'm still currently with and he's clean. How can I tell the difference, I'm pretty sure I've experienced this kinda razor burn before and stuff but my anxiety is always bad so Should I be worried?