Coming inside?

I started reading some different posts and many people are saying you can get pregnant even tho you're on the pills? Like, I know there's a small risk, but it's supposed to be small? You're on the pills for a reason? Ya'll make it sound like them coming inside is really really bad and that you'll get pregnant? From reading all this I'm starting to get worried, 'cuz I've been on the pills for a long while and I always let my honey cum inside me? We know we don't have any std's, and we don't want to use condoms. Why? Because it costs a lot and it takes time to get some that actually fit. He can't get fully erect and doesn't feel much with condoms, so we thought pills would work?