Birth control

What’s the best? I had a depot shot once didn’t have no side effects. I know it can cause fertility problems later but that’s not a problem for me (done having kids) I was going to go back to get the mirena bc I don’t want weight gain from depo another side effect dr told me about. But I never went back bc I just didn’t want anything to do with the dr! That’s just the way I am lol but ok we’ve been using condoms everything is ok but I haven’t gotten a period I had it once so far and I’m 5 months pp does the depo shot throw off my cycle that much? I’m pretty much regular every month with a period (not bf) I m sure I’m not pregnant I’m just waiting for my period..... another thing we’ve never been the ones to use condoms always how sure are they to prevent pregnancy? Also we both are scared to get surgery (tubes tied, vasectomy ) I don’t want no more kids but I hate all the side effects of birth control and I wish I wasn’t scared to have surgery but I don’t want to risk it! I cannot have any more kids! We have 3 and we’re beyond happy and complete

Any other birth control I could try? I know it would require to go back to my dr and I would lol I need too