Stay at home moms/working moms

Hello everyone I need some advise.... I am a mom of 2 and trying for baby #3. I also am a part time working mom as a hairstylist and have my own chair rental. I'm stuck in between a hard place.... I don't know if I should continue to work or stay at home with my babies! My oldest starts 4k this fall and will be gone half days so I'll be home with my other little one and hopefully be pregnant with #3. 
I work very little hours at this point due to losing my at home babysitter over a year ago. I don't work more than 15 hrs a week. But it's enough to get me out and have alittle time away from the kids. I just feel ill miss so much if I work on my nights and weekends. I guess I'm just torn in what to do and would love some mommy a Advise!!!!