Talking to other women TTC

I know a couple of ladies who have been TTC for a year or more, but they don't temp, don't use OPKs, don't monitor anything but their period start date. I feel like a crazy person because I'm doing all these things, timing everything. I've only been ttc for a couple of months now. Without being judgmental, I'm thinking "how do you expect to get pregnant if all you're doing is just not taking birthcontrol measures" but it's not like I've had success yet, lol. Anyone else feel like this?