everyone admires my strength but I envy everyone else its not really worth it....? or is it?

I am a 21f mother of two small children under 4, I work full time at a very high pressure office type job, I have my own place with my babies just us so I do all the housework but I AM SO STRESSED CONSTANTLY. I am miserable I am so unhappy with my life I know I am doing what I am supposed to be doing and I like having my nice things that I work for but I miss my kids so much. I feel like all I do is work and do things in preparation of going to work. I just want time to enjoy my babies they deserve a happy mom. It is not fair that I am always so stressed and upset. I have never ever gotten assistance but jesus I consider getting some assistance and getting back in school and just focusing on school for awhile so I have time to live again. I always said I have too much pride to do that but working full time and school full time was too much and I want to invest in my future. I have lost so much passion for life I used to be fun and outgoing and happy but now I am just a stressed out mess. It is almost coming down to whats the point? when I could have a job that pays less with less luxuries and be able to breathe.

I don't want to give up and take assistance and feel like a lazy baby mamma but is this much better when I don't have time with my babies???? I want to be there with them and adventure more and have time to play and teach them. But even on days off im so backed up from house work that I couldn't do on days I work (I work 10 hour shifts).

Yea the money is cool but, what is the point? I was dirt poor for a long time now I have had a good savings and have had this good job for over a year and a half. I know it was my decision to have my kids so young and by myself I take full responsibility and I always have, but I have actually paid into the pot and apart of me feels I deserve a tiny bit of breathing room while I get a degree. I wont just up and quit my job but I have a very high pressure job that I have a lot of metrics to hit (insurance for old people, call center type deal) and my job is extremely stressful! I wont legitimately take time off working because.... pride. But it feels SOOOO GOOD to admit how close I am to just exploding. I know this is adulthood, but man I want a future that is not THIS balance will come in time but I feel like I am not alive anymore.

Sorry for bad format but man does it feel good to get that off my chest.