Why am I feeling like this?

Indira
So about a month ago I switched birth controls. I was in the nexplanon for 3 years and now I'm on the pill. Well, for the last week or so I've been thinking about having a baby. I catch myself picturing myself pregnant a lot and my boyfriend spoiling me and is being happy. I'm just not sure how to feel about it. I'm afraid to get pregnant because it isn't the right time. I just can't shake the thought of a baby and how happy I would be. Could this feeling be coming from the birth control change?? Is this feeling normal? 😩