Need some help

Ok, so I have pondered several times on going back to school for nursing. I have three children, ages 4, 2 and 11 months. I am a stay at home mom and know I can do it for the most part, but here is why I am worried about my decision.

It seems as though every time something happens, I have to drop the semester. For example, I was going to start spring 2012, but ended up losing my job and couldn't pay for school. Then I tried this summer 2012, my daughter had gotten very sick from a UTI. I am signed up to start this fall 2012, but now I am again wondering if now is the time. My daughter has been in the hospital for 3 days now with a severe kidney infection. There may be a possibility of having vesicoureteral reflux and may need surgery, but nothing is certain yet until she has her VCUG done.

I always seem to second guess myself when something happens. My husband has a very demanding job and he has had to take off several days due to sicknesses and now with our daughter being sick so he can stay at home with the other two children to take care of them. We cannot afford him to lose his job either. So then I sit here thinking, is nursing really what I want? And I know yes. But I have heard in nursing there is no way to take vacation/sick days along w/ in school you cannot. I was told nursing school they don't care if you have kids sick or anything. They expect you there. I'm not saying I don't want to be there, I do, but when my kids are sick and my husband is at work, what am I to do? No babysitters will watch kids when they are sick. I am giving my kids extra vitamins and things to help build up their immunity and I am hoping it helps, but there are never any guarantees. So then I start thinking, what else can I do healthcare wise that I will enjoy that isn't nursing. My ultimate goal was to be an NP, but I just don't know. Should I try just 1 class at a time, forget nursing or wait to go back until my youngest is in school? I was planning to do most my classes online that I can (English, CPT 104, Psy, Soc, Nutrition, Growth & Development, etc.) but A&P and a lot of the others I cannot.

Can you please help!