How old should your first child should be to have your next

Savannah • I`m 26 I look very young for my age I have a 2 year old boy who is my world I am engaged to a wonderful man
My boy 2 years Im TTC with my partner but sometime I feel is it the right time for him he is at the stage where he is having tantrums and seeks out my attention a lot but I get that feeling when I see baby clothes