Period?

So I'm very worried because I didn't get my period at all last month and it was suppose to start the 1st of this month. I know I'm not pregnant because I'm still a virgin. I do have endometriosis and I'm wondering if this could have anything to do with it. I have been getting really bad cramps all last month n this month everyday and nothing. Plus I have a strange Oder down there. I'm not trying to be rude to anyone or anything like tht. I'm just very worried that something could be seriously wrong. I'm only 18 and I just recently started this app. Bout 6 months ago. Can anyone give me advice on wat too do? Or has anyone else ever had this thing happen to them?