TMI PIC : watery white discharge.

I'm on birth control pills if that means anything . Recently I started having watery white discharge that has a sweet kind of smell to it. I have no itching or irritation what so ever. I took my speculum and looked inside myself and it looks yellow and white . What could this be? This is a picture when I was closing the speculum . Sometimes it's pasty but I can smell it a bit during sex and if I touch it to smell. I've been eating tons of fruit and I read that can change smell! I'm worried !!! I only have one partner .. Has anyone experienced this?