Should I just ask

Hi! I’m 38 weeks and been out of work now for three weeks due to some complications. I was babysitting for a single dad for the past two school years. Just watch his daughter before school and either dropped her off at school or put her on bus before I left for my job. Anyhow, my last week was four weeks ago ( I gave him three months notice) He owes me $50. It’s not much....but I’m not working and he owes me and I could use the money. Is it petty of me to text him and say just a reminder you owe me 50?!? I feel stupid doing it but at same time feel like I did a service he owes me! Idk maybe I’m just too pregnant and have too much time on my hands 😂 opinions??