I guess it's normal to feel down...?

I'm 6 weeks with my first and we tried for quite a while. So it's been an amazing surprise. But I feel a bit down on myself, like my life has contracted as I'm not out joining in with social events like I used to. When I meet friends now, I feel like I'm really boring and have nothing interesting to say. And I have one very close friend who was on the exact same the TTC journey with me, who then found out she needed IVF on the same day I got my BFP. So I feel really conscious of the big shift between us, when we used to have SO much fun together. I am so grateful I'm pregnant, but I just feel so sad. I hate change and I'm scared of drifting from close friends. Sorry for moaning. Probably important to say that I'm definitely not depressed. I just want to know if some of this is hormonal?