Am I overreacting??

Im 28 weeks and my partner has just told me that he's invited his friend to stay with us for two weeks as of this weekend. I've been resisting my nesting instinct for our little girl for weeks whilst I finished my post grad study. Now that I've finally finished, I just want to sleep and get her room ready. I still work a lot in a stressful job. I have quite bad social anxiety, and find someone visiting for an hour to be a big strain, let alone a complete stranger for two weeks. He doesn't think it's a big deal at all. Am I just being hormonal and overreacting, or is it reasonable to be bothered by this 😣