Discharge

So I usually have a little bit of discharge down there. I heard its normal but lately I've been smelling a weird odor. Whenever Id pee id smell something like tuna. I thought people around me would smell it. Lately I've been having a yellowish kinda thickish discharge. It doesn't have a weird odor. I don't smell anything as much. Anyone know what it might be? Or have any idea on how to get rid of it?