Discharge

So I self douche everyday with plain warm water so I don’t have very much discharge, but when I do get it like the next day before I shower it’s white and thick, it also smells like mayo (don’t laugh lmao i know that’s gross) it’s not clumpy just thick and it’s never been any other color other than white. I’m pretty sure my discharge has always had this mayoish smell but I just feel like it shouldn’t smell at all. Occasionally my vagina will smell like fish but it’s a very faint smell meaning I only smell it if I touch my vagina and then smell my finger (I’m only touching the outside not the inside.) It’s obviously not normal to smell like this so what could this be? Also I’ve been checked for stds twice and everything came back negative. Last thing, I do have unprotected sex with my bf and he does nut in me.