Yes progesterone can make you moody. Are you taking it as pills or suppos? Ask for the suppos, I think they have less side effects ( but not completely sure).
You should be able ti stop the progesterone supplements at 12 weeks, generally not needed anymore at this stage.
Do speak about your moods eith your ob-gyn!
Pregnancy enhances any of your moods, so if you're depressed, you will be 10 times more depressed ( of course this is not a general rule) but because of the release of so many hormones of which Human Chronionic Gonadotropin ( which doubles every 2 days generally and rises to sky high figures) , these really may cause terrible mood swings...! Progesterone may also make you "feel" more, but try not to worry...it's normal to go through ups and downs, and stop thinking about the past.Make your future bright, start thinking that you got a second chance and that you are blessed with a little baby who will depend on you, love you with all it's little heart , and will love you more than anything in the world! Once you can truly imagine you have a living little sweetheart inside of you and actually picture him/her , I'm sure you'll start feeling alot better...!"
There are unlucky parents who have lost their child at 5, 6 7 months ( after birth ) ...can you imagine that?Their little toddlers not making it? If you can JUST imagine the pain any parent would feel with that you'd start seeing things in a different perspective. Sorry to have been so straight forward, but I really hope in some way I may have helped....
Good luck on your pregnancy and keep me posted!