by reading your post, I recalled the same experience like you two years ago when I had my first daughter, I planned to bf her but she always slept and I could not feed her. That time, I was very frustrated and wanted to quit. Most importantly, she had very little urine and I was scared that her health would be affected.
after struggling, I decided to pump milk to use bottle to feed her though I did not really want to do so. Thereafter, I became a all pump ma for 1 yr.+. Now I have my second daughter and I am now a all pump ma as well. No regret as I try my best and bbs are also trying their best.
you are already a good mother, no worried la, just try your best, if you can, feed more frequently, but never put too much pressure on yourself. baby needs breastmilk but it is not the only thing he/she needs.