Milk drying up already?

After about a week of trying and failing miserably at breastfeeding I decided to give up and switch to pumping and bottle feeding. Everything was going wonderfully for about a week where I was pumping enough not only to feed him, but also start a stash. A few days ago I starting getting less when pumping- went from about 6oz a session to 4oz. I started eating oatmeal and taking fenugreek 3x a day. My supply hasn’t changed positively at all, I actually just now was only able to get 3oz. I’m drinking tons of water, and pumping every 2-3 hours. What else can I do?! I’m already so upset that I had to give up on breastfeeding, I don’t want to give up giving him breast milk all together :(