First time..helpp!

Okay so me and my boyfriend are planning on having sex this weekend, and he's more experienced then me cause I'm a virgin:L anyhow I'm a little embarrassed cause I do get dishcharge and I don't want him to go down on me the for the first time and it be all gross and stuff so how do I get a chance to quickly clean myself before we get to the sex and stuff? Cause I don't wanna like ruin the moment but it's something I'm self conscious about..!? Sorry for the long paragraph😁