I’m kind of freaking out

I’m 17 weeks and 5 days today! Yesterday I was notified that I got accepted into the Masters of Social Work Program I applied to! I’m so excited to further my education! However I’m hesitant because not only am I pregnant, I am married and we have two little boys. I am currently a stay-at-home mom. While I love taking care of my boys I always wanted to go back to school and start a career. My husband didn’t finish college and even though he makes good money I know once I get another degree I can get a great paying job. He actually wants to be a SAHD I’m just scared and sad. Scared that the kids are going to need me and I’m not going to be there. Sad that I won’t get to see my little girl grow up daily like I got to see her brothers grow. She will be starting daycare at two months old. Her brothers started at 1 and a half years old and 9 months old. I know women do this all the time and it’s really no big deal. I just needed to be honest. If anyone has gone back to school with kids, while you are pregnant, and being married please give me any advice you have.