Full time working mom and school

Any other mamas going to college and working? It’s so hard!! I work full time, have 2 kids, 3.5 and 1.5 , I do 2 classes online to hopefully apply for nursing school next year and I just found out I’m pregnant with my 3rd. Anyone who has done this or currently doing this, how did you get through?!? I’m constantly tired and trying my best to take care of everyone and myself and further myself for my family. My husband writes from home and I get benefits with my work so it works for our family but it definitely is hard! Sometimes I get behind in school because I choose to spend time with my kids instead (which I prefer obviously) so I have to work extra hard late at night after they go to sleep to catch up. Time management is key lol