How about this: get sterilized, don’t receive communion (bc your confession would be invalid right, since you don’t really feel bad?), but continue going to mass and praying the rosary and whatever other Catholic-y things you feel like doing. Then maybe some day the Church’s teaching on sterilization/procreation will sink in, and then you can receive communion again.
or, get sterilized or use a long term contraceptive like the copper IUD, which doesn’t affect ovulation - and use NFP too. Monitor your BBT, mark your calendar, whatever. Abstain during the time that you would be fertile, if you did not have an IUD or had your tubes tied or
occluded. This way, you not only lower the chance of getting pregnant even further, but you also can also practice self-discipline, express your love for each other in other ways, grow together in holiness by praying together, blah blah blah. Basically, all of the benefits of NFP with none of the worry. You also needn’t worry about the possible abortifacient nature of the IUD bc you wouldn’t be having sex when you were ovulating, nor would you have to worry about ectopic pregnancy for the same reason.
Also, I think this will give you a leg-up to get into heaven - if you die before you can get absolved of the sin, say, you and 5 other women are in line to get into heaven or hell and the other 4 did not use NFP on top of their sterilization, God might be like, well, at least you gave it a really good effort, those 4 didn’t - heaven for you, hell for them!!!
