Drop in milk supply?

Carissa
I'm 18 days pp and ebf, seems like the last couple of days my milk supply is really low...  Baby boy usually seems satisfied after feedings right now, but I'm worried my supply is getting Lower and he soon won't beI don't seem to have any of the engorgement that I was previously having, I almost feel empty. I was also pumping a couple times a day to build up a back up supply but I'm only about to get about 2-3oz a day from pumping now. A week ago my breasts felt full several times a day and I could get 3-6oz no problem. Not sure if I should try pumping more often, add a supplement/tea, Any suggestions?!?