Periods

I guess my periods just come when they want , this calendars says the 16th I was post start my other calendar says 22nd and I just started😡😩 .. he's been tryna get me pregnant since October . I guess maybe it is a good thing it did come I'm so stressed out . But he really wants me to have his first child and I want it to happen to , but we're not together anymore and everything is different with us and I feel like having a baby would make things worse and don't wanna put another child in a situation like that I already have 2 kids by another man. But I been having baby fever I haven't had a kid in 5 years