Milk supply dropping??

My LO is 5 months old and is EBF. When I used to pump I would be able to fill the bottles, now I’m lucky if I get a few ounces. Does this mean my milk is slowing drying up? I never feel engorged anymore and leak milk like I used to, I check when she is eating to make sure she is gulping and she is. Im working home right now so nursing isn’t an issue but I’m just worried if I go back to work I won’t be able to pump enough to keep up.