Just found out I’m pregnant with my 3rd

I was wondering if anyone had experience on age gaps with having kids? My eldest will be 15 when baby is born and youngest will be 14. I’ve read some comments on mums net about this type of age gaps being selfish etc?..

I was actively trying for a baby since 2014 and my periods became non existent in 2023 I was diagnosed with pcos. I was giving medication which enabled me to loose 5 stone. I also had the coil placed for heavy bleeding as this was how I was diagnosed. My coil actually fell out 3 months ago and I thought there was really no chance that I would get pregnant again after all these years of getting my hopes up but it has happened and now I’m so worried about the pregnancy in general and my other children how they will react. Anyone with the same age children please tell me your experiences. Many thanks