L.,
You can make it through. I promise.
I second the recommendation on the crockpot. It will save you a ton of time. Additionally, when you cook, cook twice as much at one time. It doesn't take any extra time, and you will make an extra meal each time that you can just heat up quick, so you're only cooking every other night.
You mention that you are working on your master's degree. Good for you! This will make a world of difference for the future, so make it a priority. My husband is pursuing hismaster's as well. His university has almost all of their classes available online, so he's only needed to take one class where he actually goes to school. It makes a world of difference, sicne he can do it all from home, in his own time. See if you can do this, then you can study and all from home after she goes to bed.
I'd say skip the gym. Its a place where you can afford to drop the ball, if you've got too many in the air. While fitness is a great thing, and we all want to looki dynamite on our wedding day, you will anyway with or without the 10 pounds! If it's really important to you, try walking for exercise during your lunch break at work. It's free, and it doesn't take up your time with your little girl.
If I were in your position, I would set my prioirities in this order:
1. Daughter time
2. School
3. Work
4. Save money
5. Get fit
When you work on achieving your goals on each item, think about it from the standpoint of affecting the items above it as little as possible. Like saving money doesn't rate as high as going to school does, so I wouldn't skip the semester in order to avoid spending the money.
We women can have it all. It's just hard to have it all AT ONCE. Do the best you can, keep your priorities straight, and you'll work out the parts that are most important. You may not achieve it all, but you'll get to the things that matter most. Be proud of what you accomplish, and how hard you work to better your life and your daughter's, and let the rest go.