Constant bleeding and sex/periods

Hello, had my iud put in 2 weeks ago and still have constant brown bleeding. No idea if its now segueing into my period or not, or how to tell when period starts or ends?

I understand this could last some months so I have 2 questions for those with some experience

1. how do you track your periods now?

2. how do you approach sex when you're always bleeding? I am self conscious about this and my ph doesn't like it so the thing that was meant to allow us to have sex without worrying may end up preventing us having sex at all! Doesn't help that the blood smells gross and not like period blood (not infected gross, but different from period blood which smells fresher to me)