Missing my period

I’ve missed my period for about four months now and ik I should go to the doctor but what’s the worst that they’re gonna tell me? It’s honestly been real nice not having my period, especially over the summer. Do I have to go to the doctor? From the stuff I’ve read the worst it can be is pcos or whatever it’s called that will prevent me from having kids but like I’m 16 and I never want kids anyways so it seems easier this way? Am I just being really stupid??