Rotten Cum

Okay so I know this is a weird post. Basically I’m on birth control and Ive started to let my boyfriend ejaculate in me recently. I’ve started smelling this awful smell and I’ve never had any problems like this before...so I know it’s probably from my boyfriend and his cum that I assume just stays in me and causes this smell. Is there any advice/remedies that can help? I’ve already thought of just asking him to stop cumming in me.