how can I rebuilt my life

You did not mention what you do but is sounds like your in nursing and there is a high "burn out" rate with nurses because of the heavy responsibilities they have. If you are a nurse there are other places you can work and continue your nursing position, for example you can work in the "Blood Bank" these people are not sick, you are taking blood donations from healthy people and you still are keeping your nursing position. Radiology, Clinics, Psychology to name a few. Emergency Room positions are very stressful and working on a "ward" is a lot of work. There are many other options available. Good luck.

Sounds very much like "burn-out." You are running out of energy and fuel for your present job. You probably need to take action quickly. Relieve some of your pressures. Eat right and especially drink enough water right now. Your body is probably using it as quickly as you put it in the system. Sounds like you might be a nurse. If you have a career goal, don't let go yet. There are many other areas you could go into and help people. Getting married is not the answer in my opinion. It is just a new work environment and may be even worse than those outside the home. If you get married, let it be for finding the right soul mate you can be a help to and he can be a help to you.

Is the overtime temporary, or will it continue on permanently? It seems you love your work, but there is just too much of it. Is it possible for you to look for another job in the same profession, but without the overtime? You should try to find a way to balance your life, so that you can do your work and help people, but also take care of yourself! Also, is it possible you could be sick? Maybe some underlying illness is causing you to feel so bad. I know there are illnesses that are hidden, and not readily obvious, even to doctors (I assumed you are a doctor?) Staying home to care for husband and child is not exactly easy! However, it is probably not the same kind of stress, which is better.

You are only 33 (if that's correct in your profile)! Be optimistic! Your whole life is in front of you. Do what you do best and do it well! You can just go outside and find somebody to marry him/her. Technically you can, but you understand me! If you think that it's time to find a new job and maybe it is time for that. But never stop pursuing your dreams, ever. That's one part of everybody's life, dreaming! Believing in yourself. At some point everybody feels like you, even worse! But you know what they say "what doesn't kill you only makes you stronger (or maybe stranger)" Hmmm...