What effects do people get after using it?

Basically I always get thrush after my period, I either treat it with coconut oil or oregano oil. Last time I used oregano oil, I ended up with tonnes of clear stretchy discharge/cm and then got a lump/cyst in the vagina lip, anyway, ive taken in again after my last period, and I'm having lots of this clear stretchy discharge and I can feel the lump starting to come back, is it related to the oregano oil?

Any advice would be helpful - I use cups and not tampons or pads