Vaginal discharge.

Hii! So I have been trying to convince for a little over a month now, I recently got off the depo shot about 13 weeks ago maybe a little longer. It’s about 2 weeks until I get my period but not for the last 3ish day’s I’ve had a really thick white discharge(tmi) and it has gradually started coming more the 1st day want that much, there is no smell or itching or burning but I’m wondering if any of you by change would know what the cause of this is. Greatly appreciated