Antibiotics and Mirena

Okay so I am a bit of a hypochondriac. Well I have had the Mirena since May 2015. Well I had to go on Bactrim (ended up being allergic) then switched to Nitrofurantoin. Do these have any interaction with the Mirena? Because I have been having sex with just this as our primary form of birth control and I'm kinda sweating it out now. Any help is much appreciated.