I go through it a lot in my life. I also suffer from clinical depression and work hard to fight those feelings back. It is hard.. trust me but I have lots of tools in my goodie bag to help me! Exercise, pampering myself, reaching out to those I trust, even going for a simple walk can change my mood greatly.
Sounds like lots of new changes and even good changes, believe it or not, can depress us.
Be kind to yourself, spoil yourself rotten even.
bb