Does age really matter?

I'm 21 years old. And my boyfriend is the same age as me. I'm a month older than him. We have been together for about 4 years, next April will make it 5. We have a 3 year daughter together. 💕 And I'm 6 weeks pregnant. 🙈 Could be my hormones making me think, and not that I'm doubting this relationship. My boyfriend and I are really happy together, we have our ups and downs but I'm sure every relationship has that. I'm just curious to know... does age really matter?? 🤔