Funky Smell down there

So I have an IUD and I’ve had it since August 2018. When my ex and I had sex almost every day for a week before he moved, everything was fine. He had sex, he would cum in me and afterwards we clean up and I go pee and try to get some out by pushing and then continue on with our days. Well the week after when we were not together or having sex I would have to change both my underwear and pants about twice a day not including after a shower and going to bed. The smell was so bad and I felt like everyone around me could smell it, too. After that week things didn’t work out and I wasn’t having sex anymore and the smell get better (as in non-existant). Now I’m with a new guy and we’ve had sex 5 times in the last 2 weeks and he does the same where he nuts in me and then we clean up and I take a shower later or the next morning. I have been changing my pants and smelling bad 🐱 for a couple days now and I’m getting annoyed. I even shower and use pH balance vagisil every time I shower and I feel nothing is helping. Is this normal and how have any of you fixed it?

Would douching help? Should I see a gyno for clinical stuff?? Please help