I have been having a hurendous smelling, light brown and sometimes light blooded, discharge from my vagina for the past two weeks. The smell is very strong and nasty. When it discharges I can instantly smell it. This has gone on way past my period and has interfeard with intercourse as well. How can I stop this and should I be worried.

Yes, you should be concerned and only a Physician can diagnose what it is.

If it is an infection, and it could be, you MUST see a Physician.