Changes Turned Into Pregnancy

Need to vent along with positive vibes.

Me and my fiancé have been talking about possibly trying. We haven’t really agreed on anything just yet. I was having extremely heavy periods with my IUD & I decided I would switch birth controls since we did not decide. My fiancé does not have any children but I have 3. He has mentioned that he wants to have kids with me & I would like to as well.

I did eventually switched over from the IUD to pills. I originally planned to get the depo but I heard side effects are everlasting when getting off.

Im now pregnant & I feel like its my fault for switching. Although my fiancé will be nervous but excited for this unplanned pregnancy, I have this huge amount of guilt weighing over me. I always wanted to have a planned pregnancy as my first 3 were not planned. But for the 4th time it has happened. Am I thinking too much? my fiancé is so supportive of everything, so I am not sure why I feel so negative or down about this.

While I am aware many women struggle to conceive I should be grateful & I am. Just have some of my own insecurities.