The tea will not help much unless you drink gallons of it. Fenugreek is an herbal supplement that will help, but you had the right idea to take some time off and feed him directly. What would be better is if you napped with him and let him nurse anytime he seems interested while he is napping. The skin on skin contact and just him being close to you will help stimulate production too. I think most Moms have trouble about this age, I know I did off and on when I was working full time, but with some extra rest, extra nursing/pumping, lots of water and fenugreek, we got past it. I just had to use up some of my freezer supply while my supply was low.
Here is info on fenugreek. You really have to take alot of it....to the point where your sweat is smelling of maple syrup....before it starts being effective.
http://www.kellymom.com/herbal/milksupply/fenugreek.html
Don't worry too much, you can get past this and it doesn't mean you have to stop. In the worst case scenario you will have to supplement what you pump with some formula but that doesn't mean you can't continue to nurse when you are with him or that you should stop pumping. I was able to pump up until 14 months even though I had several time frames where my milk supply got low. You just have to be determined and do everything you can to get your supply up!