How long did you Breastfeed your babies??

I recently stopped at 2 months only because it was stressing me out that I had tried all kinds of things to increase my milk supply and the most I was producing was 1 oz in total and since my baby isn’t gaining weight how she’s suppose to I just decided to go with formula for now on, it makes me a little sad that I wasn’t able to make enough milk for her so she wouldn’t need formula but trust me when I say I tried everything I mean EVERYTHING and nothing helped, anybody in the same or similar situation as me?