Do you ever get an uneasy feeling when anticipating a big, positive change?

I’m not really sure how to explain it, but it happens every time I’m about to make a big change, especially if it’s career-related.

Here’s a little background: this morning I had a preliminary interview for a new position within my company. It’s something I’ve wanted for a very long time but only now am I fully qualified to apply. A few days ago I randomly sent an email to the lady in charge asking for advice on how to best go about applying for the position I want, even though they didn’t have any openings on the career website. I wasn’t really expecting a reply, but she messaged back a few hours later asking for my resume for review, which I sent right away. A few more hours later and she emailed me back to schedule an interview, which I had this morning. It went really well and at the end of it she scheduled my second and third interviews for the second and last weeks of July, respectively.

I’m really excited and happy to have this opportunity, but at the same time I have this queasy feeling that it is all happening so fast! My main trepidation, although it’s a sacrifice I’m more than willing to make, is that I will have to quit my current position (which I love) for two months before I can officially start on the new one, even though it’s all within the same company (just under different umbrellas). Consequently, I will also have to give up my lovely, big-girl apartment and move back home with my parents for those two months. I love my family to death and can’t wait to see them because it’s been so long, but I’ve always been super independent and haven’t been home for more than a few weeks at a time since I left for college seven years ago (gah has it really been that long??), and I’m sure the boredom resulting from being idle for so long will drive me (and them) up a wall. So, naturally, the thought of being jobless for two months is filling me with anxiety, even though I know it’s only temporary and will lead to better things in a position I’ve always dreamed of, a position that is not only a major stepping stone towards my long-term career goals, but also one that will allow me the opportunity to travel the globe!

How can I deal with this funky feeling? Should I just ignore it and hope it goes away soon? Am I overthinking this whole situation?