Tube tied?

I need some different opinions. I’m only 17 and currently have the Mirena IUD. i know that it’s really effective but i still freak out about being pregnant when i have sexy with my boyfriend. my boyfriend and my girlfriends tell me to relax and stuff will be okay but i’m still super paranoid to the point where i take tests 3 weeks after i have sex with him.

i also get super nauseous and headaches daily now with my IUD. I’ve only had it for two months but still. So i was thinking about going and getting my tubes tied. i know it’s a permanent thing not a temporary one but i think it would ease some nerves a lot more.

I’m just looking for different view points.