Question!

Alora

So ladies, I’m a little nervous to even ask this but I️ just need answers! So my bf and I️ started having unprotected sex after i got my iud in November. He’s recently started finishing inside me occasionally but not every time. I️ know that semen has a different ph than lady parts but I’ve noticed that since he’s started cumming in me that there’s been an odor. I️ have no signs of an infection or anything, I️ wanted to see if anyone else has dealt with this problem and if you have any tips on how to fix it? (Other than him not finishing inside) thanks so much!