That depressed feeling also is, unfortunately, to be expected. Many of us have had to deal with some type of "down" feeling or depression. I would stand by my front window for quite some time and watch the world go by. Others have wept, and many have felt some level of depression.
It can come from a variety of sources---the pain meds, the loneliness, the lack of independence, all contribute to this feeling.
Your leg is achy, and that is normal, too--with my knees, my aches and pains would migrate around each leg! Everyday, it was something different each day. Just follow the mantra---ice, elevate, and rest. If you hurt doing something, stop doing it. You will be amazed at the aches and pains that will pop up, migrate, and then disappear as you recover.
Once you get those staples out, things will feel somewhat better----but as you work for increased ROM, just take it to the point of discomfort, and no further---this is a roller coaster ride you are on, and you will have some good days and some clunkers, too; just hang in there and you will reach your destination!