How did you know?

So I have 2 kids they are 15 months apart. I got on birth control in October but I’m going back and forth with wanting one more or not. I don’t want to be on birth control anymore it’s just so annoying with the prolonged bleeding. I’m thinking about my husband getting a vasectomy (he is okay with it). I’m just scared once he gets it I’m going to regret it and want another one. It’s just I get so frustrated with my 2 now I know it’s not good but I have mom rage. So I’m really thinking if I want another one or not because I get really bad postpartum depression and mom rage. Some days I feel like the worse mom ever because I’m constantly screaming at them. When they are just babies and don’t know better. How did you know when you were done with kids for good? I’m just so in between. 🥺