4th baby

So I am 15w1d and I have three children the oldest being 5. I have 2 girls and now I will have 2 boys. I'm pregnant with my second son. So I am 24 soon after will be 25 with this 4th baby. I am farther along yet still scared. I was not ready for this baby, even though he is a blessing. I am currently in nursing school and have a lot going on I have yet to tell my parents at all. My youngest daughter is close to 18 months. I am excited yet terrified I plan on having my tubes tied after this no questions asked I am for sure done but this is my last time and it is also like a sad goodbye to this part of my life. I have yet to tell my kids either, but I plan on telling everyone soon I just need someone to talk too. Is there anyone with 4 children? I was told that this is too many kids blah, blah, blah.... it's always with negative backlash I feel I just want to hear positive stories right now... sorry if this comes off too needy I'm just a wreck...