Sixty Four and Just Found Out That I'm Having a Baby

I've been really lethargic lately and gaining weight even though I'm not eating that much, still trying to lose my holiday pounds. Went to the doctor, something I rarely do, and they gave me a lot of tests.

Turns out I'm over 3 months pregnant and I've never been pregnant in my life, I had a female problem that I found out about when I was 30.

My husband's older than me, and I'm concerned now that we'll be too old for child, but we're strong and we'll make the best of it. I haven't told my husband yet, what are your thoughts?