My last period was 95 days ago, what should I do?

Last time I had my period was 90 days ago and I'm starting to get scared that something might be wrong with me.
I had my first periods 4 or 5 years ago and had them each month but now I don't know what's happening with me..
I'm almost 18.
And NO I'm not pregnant, simply because I'm still a virgin.
My last period was 95 days ago, what should I do?
Post Opinion