I know how you feel about the limitations that nursing and pumping bring. I too was really stressed out, it actually has gotten a lot better recently. But if you're unhappy and depressed then honestly I would consider formula, your happiness is important too and your baby will be happier if you're happy.I commend anyone who attempts to breastfeed or pump, but it's not for everyone.
Lurking again (I'm just so anxious to be here!), and I agree with this. I was able to EBF my daughter, then pumped when I went back to work, but if a pumping schedule is eating into your life and happiness, then you should reconsider. I'd rather feel relief at being able to go out, do things, and sleep at a proper hour, than feel stressed out about needing to pump. Are you nursing at all, or exclusively pumping? Maybe you could even cut down the pumping sessions so it's not so overwhelming, and supplement with formula the rest of the time. Some is better than none, especially if trying to stay formula-free is stressing you out so badly.