Discharge

I've been reading up about discharge because lately I have been having a lot more sex. My discharge is usually a bit stringy like egg whites but never clear always a yellowish colour. Lately it has been more chunky and like rubber or something. Is this something I should see the doctor about but I don't want to go with my parents or have them find out that I have had sex. Help please!!!! (We don't use condoms but I'm on the pill btw)