First time mom

Meg

Hii so this is my first pregnancy and I am now 18 weeks and 2 days but I feel like since about probably the end of the first trimester like I don’t like being social or if my bf invites friends over I’ll just stay up in my room because I don’t really want to talk which isn’t me because I used to be this bubbly extroverted girl and I feel like im beginning to become an introvert.. (keep in mind my bf plays music and on Thursday, Fridays (bars , etc) (most Saturdays evenings are with his friends at home or he sometimes does it on fridays) are basically me coming with him to watch and listen which I love to do but when it comes to Saturdays I just feel like taking it slow relax watch a movie not being with peoples again..) I just want to know if this can be normal in pregnancy