Itchy vaginal lips?

Hey ladies. So yesterday (Thursday) when I woke up my lips on my vagina were itching like crazy. I’ve been in a committed relationship with my boyfriend and we don’t use condoms. We had sex Saturday and Sunday but I haven’t started feeling anything until Thursday. It itches again today. I have no odor and no unusual discharge. But I can’t reason why my vagina is itchy. I haven’t changed any soaps or anything. I had like a few bumps come up on my vulva area a few days before he came but every now and then I know women get these. I masturbated Tuesday with my vibrator (I just use it on my clit). And I’m not pregnant. Any advice on what this could be and what to do?