Im scared!!!

I really need to go to the doctor because I haven't had my period in 3 months. I am so terrified to go! 1. I am supposedly covered on my dad's insurance still (Select Health), but don't know if it's true because I got married in November. If I am not I can't afford anything. I've always been regular, never been on birth control, I'm not pregnant (negative tests and blood work last month. Home tests still neg).

2. I am scared something is really wrong and I won't be able to afford to do anything about it. My job only pays $8.00 an hour and I'm barley part time. I only get about $200-$300 every 2 weeks .

I am losing my mind and I am terrified!! idk what to do!!