White thing on the opening of my vagina... no pain, no odor, nothing out of the ordinary.

Hello, I’m very new here and would appreciate the most honest replies. also any negative comments will be removed and you will be blocked. 

I’m 20 years old and pretty sexually active among 5 different guys in the last 2 months. I’ve had this on my vagina for a while, it doesn’t itch/smell/hurt/cause anything out of the ordinary. i’m wondering if it’s from chaffing or if i need to be checked out. i trust all of my partners but you never know i guess. i cannot afford testing any time soon. i’m just curious and trying to remain as calm and collected as i can. 

anyone who can point me in the right direction, that would be great thanks 

Well if you don’t mind post a picture of this “thing” you mentioned. And there is absolutely no judgement regarding how many sex partners you have. Sex is a pleasurable thing and if you like sharing it with multiple people then that’s your business. But what I hope that you’re doing is using protection. Like you said “you never know”. It’s easier to trust someone if you’re in a relationship with one person but you’re dealing with 5 people who may  or may not know if they’re carrying anything.