Odour from down under

For the past few days I've had a stronger than usual odour. My bf was home for the weekend and we are TTC so I was thinking maybe from the semen it could be caused. There are no other symptoms like burning or itching. I am supposed to get my period in a few days and read that might change the odour. And my diet is pretty decent. I am human! I have been trying to add more yogurt for the probiotics but it's a tough one to get down. I haven't experienced this before.  Any thoughts?