What do you do when all you do is never enough?

I am a mother of 5 boys. My husband became seriously ill.  I feel like that no matter what I do I can never provide what everyone needs.  I have worked many places in life and I have worked very hard.  I have found that being a woman in any workplace gets you the lower pay. It doesn't even matter how smart, efficient, or loyal you are. My husbands illness made it virtually impossible to work at any job for a long time.  It has ruined us finacially in everyway posssible.  One of the reasons is no doctor can seem to figure out what is causing his helath problems.  We are on state insurance and the doctors just dont seem to care.  I recently had to give up a job at LOWES.  I was doing great showing what I was capable of  and then boom I had to leave because of my husband. I am not complaining but I am tired of being caught in the middle.  I need freedom from the everyday burdens.  I need the wings to fly with.  I am going to try to goto school to be and OB nurse because birth is life and that brings me joy.  Anyway, thank you for listening and I look forward to hearing your comments.