I'm 24 now, but I get what you're saying. We both grew up in a culture where having a kid early was the normal. My sister that's my husband's age has a 4yo and my BIL that's a year younger than myself had a baby with his GF that's my younger sister's age (21 now, but sure was 18 when they conceived). My younger sister just got married and will likely start trying within the next year or so.

I have my husband a deadline of starting to really when I'm 25. At the time he agreed, but has argued about it every time I've brought it up since. My family has history with infertility and miscarriages, so that doesn't help either. We could wait another 6 years until I'm 30 and then be in the same situation my oldest sister (32 this year) is in, where she's been trying for 6 years and has basically given up at this point because nothing they've tried with their RE has helped....

I'm feeling better today, but I think the hamster wheel you mentioned just got to me yesterday. I think it's more of feeling like I keep getting empty promises that of course he never remembers making and that when I try to explain my desires, it usually just ends in being told why that is silly and I shouldn't feel like that. We're working on communication but it's hard to explain that I don't feel like I'm being heard at all...