Is there anyway to predict when I'll get my first period?

Ok so im 15 and have been having vaginal dischrage for nearly 8 months now before I have gotten my first period and I know its normal. I have everyother sign of puberty (breasts, hair, pimples ect,) and I want to know if theres anyway you can predict when im going to get it? Also another thing I would like to know if theres anyway or signs if or if not I'll continue the dicharge after I beging my period? its a pain in the but because ni have to wear a panty liner everyday! I hope you can help! thanks

Your period should come at a regular time every month, there should be certain dates it will come, 4 or 5 days a month.

I started my periods last year and I still have discharge and you shud start soon