I've suggested it before, but condoms. Used correctly and consistently they're quite effective. I would NOT suggest a Mirena for you.
If you'd like to be sterile permanently, go talk to the Planned Parenthood off of County Line. I went in for STD testing last week and ended up talking about Essure with them. . . I think they said it was 2-3 grand without insurance and they had a doctor that would be happy to do it for me despite my age. She said the doc has even done it for people under 21. I think you'll be fine. PP does take insurance, so it could cost you a lot less - and it's permanent.
If you'd like to be sterile permanently, go talk to the Planned Parenthood off of County Line. I went in for STD testing last week and ended up talking about Essure with them. . . I think they said it was 2-3 grand without insurance and they had a doctor that would be happy to do it for me despite my age. She said the doc has even done it for people under 21. I think you'll be fine. PP does take insurance, so it could cost you a lot less - and it's permanent.