Hello,
You plant looks healthy which is the most important. And some of these autos don't get as big of buds as others. But also they do pack on serious weight in their last weeks...so its not over till its over. You still have dominantly white pistils too so it could be longer than 2 weeks left. Maybe try adding in some molasses to your water, thats a good bulking/sweetener for the buds. About a tablespoon per gallon.
Happy harvesting. ✌️