The only non-medicinal remedy that I have ever found that helped me (I don't, personally, like meds and don't like what I feel like on them) so I use exercise to control my moods and feelings post op..since I can't run anymore (never really could) I walk miles with an MP3 full of music that I have collected and that makes me feel good...I walk about an hour a day, most days, and it does wonders, I feel stronger, more at peace and it tires me out sufficiently to help me sleep better at night. It also helps clear my system of the anesthetic and other drugs and gives me better muscle ton after weeks and months of bed rest.
If you can't walk for long periods try short little walks a few times a day...it is not a miracle cure but it is an all round aide for what is ailing us and clears our minds of the cobwebs.
Hope that this helps a little bit.
Also, you may need to be a bit sad for a while post op, you have been through major trauma and big changes as far as your body and your biology go and you may suffer some post traumatic shock due to this all...so allow yourself to feel some pain and disorientation...it is normal.
Wishing you the best in your recovery.