I’ve posted a few time about this but I’m starting to get anxious.

I’ve been getting my period for 2 1/2 years now and it’s been six months and a week since my last period. I read somewhere that after your third or fourth it shouldn’t be more than 30 days apart and if it is more than that I should see a doctor. My mom says it’s normal but I feel like i should see my doctor. Every time I have a period (I’ve only had about 5) it lasts around 10-12 days and it’s pretty heavy. I’m getting worried that somethings wrong.

Any opinions would be helpful