can I breast feed after 3 months

Abby
I was having issues with my nipples plus my milk would come out very watered down there was no fat in it and he was losing weight very quickly so after a month of trying I gave up now he's almost four months old my supply has vanished but he's latching perfectly now and so today I just been pumping and putting him on the breast before I give him a bottle I have also started taking supplements to help with my milk but I'm just wondering if it's even possible to get my supply back and also wen I pump the milk comes out very very thick but I only get a few drops