Michelle, if you give up, you will regret it. However, you may be able to change your life in ways that make it a bit more tolerable. I twice gave up my dream to satisfy what first my husband and then my mother wanted me to do. Neither cared at all about what I wanted to do with my life, what my dream was, what would challenge and feed me. They each only wanted their own lives to be more comfortable, and each of them abandoned me when I needed them most.
Follow your dream, if only so that your daughter will see that and follow her own dreams. Guess what? Girls whose moms work hard to get degrees are more likely to work hard to get their own degrees. And seeing you struggle may encourage her to wait to have children until she is out of college.
Don't give up, but address your fatigue and depression. Make your life simpler, delegate more, do less except for at school. Don't neglect your daughter, but help her learn to do some things well by herself and to help you when you need it. You are a team, and your goals are important too. This coming from someone who gave up her own goals for her son, mind you. But, if I had to do it all over again, there are things I would optimize so we both could reach our goals.
If you can, spend less time with people who don't support your goals, and find things to say to change the topic with people you can't avoid. Then, develop friendships with people who will support and encourage you. Then, say to your daughter that her mom is not giving up on her dream and will work hard to finish college because you have so many more opportunities and can also make more money when you finish college. Tell her that you want her to finish college and work two years before she has a child so it won't be so hard for her. Remind her of that regularly in a very positive way. And, tell her you are a team, and you need her help. Tell her when you get your diploma, she will get one too, and then make her one to go with yours on that day.
Never give up.