Would love to have his bab(y/ies)

I am 33, hypothyroid, and obese... I already have a 13 year old son from a previous relationship. I met my boyfriend/best friend over 2 years ago through a mutual friend. We have been dating since February. We both have decent jobs with reliable income. We have talked about having children together and we both wanted to do so after we're married (not even engaged at the moment nor foreseeable future), build up our finances and have a reasonable home of our own. Good goals, right? Definitely! Awesome!

He is a fantastic man. Very loving, caring, patient, understanding, trustworthy, loyal, intelligent, selfless, great with animals, handsome, sociable, hardworking, romantic, affectionate, mature, kind, dedicated, authentic, honest, etc

So why am I suddenly consumed by the desire to have a baby with him sooner rather than later?

Am I concerned about my age and health? Yep!

Am I concerned that the age gap is only going to grow with my first child? Yep!

Am I worried that he'll change his mind later or leave me? Nope!

I can't explain it but I want to share that experience with him now.

I need advice or at least some common sense or something, please help me ladies!!!!