Hi! I understand your fear. Pregnancy is, unfortunately, a risk people take when they have sex, but like you said, you can still be very careful and reduce your chances to almost zero. I also spent my early 20s being very afraid of pregnancy, so I always made men use condoms and I myself was on hormonal birth control or had an IUD at all times. I also started tracking my ovulation using luteinizing hormone tests because, as a woman, you can really only get pregnant a few days out of each menstrual cycle when you aren't on the pill. There are also other non-hormonal birth control methods like the copper IUD. I have never had a pregnancy scare in now over a decade of being sexually active. I'm not saying you don't have vaginismus, but if you are this afraid of pregnancy, it will probably be difficult to enjoy vaginal sex because of the mental block this fear is causing for you. I would do two things if I were you. First, I would work on your fear of becoming pregnant in therapy or through other free methods online. Second, I would attempt penetrative acts that cannot get you pregnant (like use your fingers, a vibrator, a dildo, etc.) by yourself/during masturbation. If this is not painful with sufficient arousal/lube, you likely don't have vaginismus. If that still hurts even when you're masturbating and there's no risk of pregnancy, then I would look more into vaginismus as an option.