To have a third or not???

Personal experiences please!! I know this question is asked a lot, I'm just hoping that ladies in similar situations can share their story.

I'm a very happily married mum to a 3 year old and a 3 month old. I'm 39 and I thought we were done having kids. My hubby is booked in to see a specialist for a vasectomy at the end of the month.

We had a scare last week, but the pregnancy tests were negative and I've since got my period (yes, even with a breastfed bub).

The thought of having a third actually made me happy but we only have a small 3 bedroom home and would need to upsize both cars.

I loathe being pregnant but breeze through delivery. My youngest is also the perfect baby - sleeps through, feeds well and laughs all day.

I don't want to use any permanent or semi permanent form of contraception for me.

Question - am I just thinking about a third child because of the impending vasectomy? Have others gone through with vasectomy and regretted it? If you went for a third, did you upsize anything? Or am I still clucky over my perfect bub and my very loudly ticking clock?