will my supply go back up?

I exclusively pump and for the first week it was wonderful, my supply was going up steadily, I was pumping 4.5 ounces on the right side each time and 3-3.5 ounces on the left. but then I got lazy with it a few days ago and went 12 hours without pumping. I know this was wrong. and it messed up my supply so bad. my daughter is 12 days old and drinks 3 ounces every 3 hours but I only get 2 ounces combined every 3 hours. I started fenugreek yesterday and I eat oatmeal and started mothers milk tea today. I'm getting very discouraged that my supply hasn't gone up yet. I really don't want to start supplementing (but will do it when the stock in my fridge runs out) will my supply go back up if I keep it up, or is there no hope? any other advice?