Breastfeeding AGAIN !

Marilyn
Hey mommas my baby is 4 months old & BF'ing didn't work with me and my baby since the start however I wanted to keep supplementing her with breastmilk so I decided it was no big deal to exclusively pump...then 2 days ago I decided why not give it another chance now that she's older, surprisingly she took it right away without a problem but she only takes one boob at a time and won't really empty them out. When I would pump I would get 8oz from both breast every 3 hours and I notice she she only eats about 4 my question is will my supply drop ? I've had no problem with my supply but I don't want it to drop either..... Thanks ladies!