Lump under eye after fillers, granuloma?

I'm sorry for your concern. You should not worry about granuloma as you cannot get one in just five days. You need to go see your injector today or tomorrow if your lump is really that big. Best wishes, Dr. ALDO 

Without photos and a full examination, it is difficult to know exactly what is going on.  Six days after an injection, however, is still fairly early and the most likely possibilities have to do with swelling or bruising in the area from the injection.  Generally a granuloma would not form so soon after an injection.
If the area is tender, some ice can help with comfort.  Give the area more time to heal from the injection. I tell my patients to wait at least 2 weeks before evaluating the final result.
Should the bump persist after 2-4 weeks, you can have the area treated with an injection of hyaluronidase to dissolve the filler in the area.  Often, this will help resolve the bump.  Waiting until mid-Sept to go back to see your injector is a fine amount of time to wait.  If you need to see someone sooner, I recommend visiting a facial plastic surgeon or plastic surgeon who does his/her own injections.  In my opinion, they are the best individuals to perform injectables and address potential complications from them.
Best of luck!