Should I worry about condom breakage,semen leakage, slipping off, etc?

I know theres like a 97 percent chance of a girl still getting pregnant, but this is kinda lame. I mean theres a chance that a plane could crash into my house. But seriously guys, Im kinda getting worried that if I have alot and use Trojan condom, it will eventually break or semen can leak eventually. basically im just scared of some kind of little error. LIke do i have to wait till marriage, or are there plenty of people have have hundreds of times and the condom always works. Like should i worry about semen leaking, condom slipping, condom breakage. What about if I apply lubricant to the condom. But ya what do you think, should i learn to have with condoms and never worry? I have used them before, but damn i read that if 100 women have with a condom 3 will get pregnant. I mean should i stop having once I hit the 97 mark? lol...yet seriously?