hi,
i agree with the statement above it's either bacterial vaginosis or a infection, and you should go to your gp and get a swab taken if it's not a infection it's likely to be bacterial vaginosis,
not sure if it would be a sti (what colour was the discharge?) hope this helps
You could have an STI or something called bacterial vaginosis.
What this means is that you have to go to the doctor and get the appropriate antibiotics to fix the problem.
Go to the doctor now. Don't wait. The longer you leave it the more chance of doing permanent damage to your reproductive system.