I’m adding an adendum to my answer above (which I hope you read).
It doesn’t matter whether you can feel the condom breaking, leaking, or coming off. By that point it is too late.
My friend and her boyfriend are relatively responsible adults in their early 30’s, but because she cannot use any hormone based birth control (such as an IUD, birth control pills, injections, or patches) they had to use condoms, and the most recent time, which was 4 weeks ago, the condom failed.
She had an abortion yesterday. It was awful. She didn’t really want to do that, but she is in no position to raise a child.
If she would have come to me earlier, I would have suggested that she also use a diaphragm with spermicidal jelly, in addition to using condoms. They used condoms every time, but this last one failed.
Please educate yourself on what forms or birth control are available, and how to use them properly, and have discussions with potential sex partners about what you want to happen if you do become pregnant.
In my friend’s case, her boyfriend was willing to pay for the abortion, but I suspect that their relationship is not going to last at this point. They were only 4 months into their relationship when this happened, and they were already having regular relationship problems that people often do, when they are deciding whether to become more committed to each other, or to break up. My friend was relatively lucky. Her boyfriend is a decent guy, whether or not they decide to break up or stay together. Lots of young women, especially uneducated women (and take no offense when I point out that we are dealing with uneducated people here).
My friend still ended up pregnant, and had an abortion, something she will have to deal with for the rest of her life.
Educate yourself.
Here is pretty much everything you need to know to make an informed decision from Planned Parenthood:
https://www.plannedparenthood.org/learn/birth-control