I have been on my period since the 3rd this is very weird for me I'm going on my 9th day being on my…

I have been on my period since the 3rd this is very weird for me I'm going on my 9th day being on my period and its freaking me out because my period wasn't suppose to start until the 9th and it started on the 3rd what if it wasn't a period what if I was pregnant and I had a miscarriage. I have no idea though my period have always been regular so it's just very weird.