Sometimes, just a 'hug' can say it all....
You've come to a wonderful place to get support....GENUINE care!
People here are so down to earth.....it's a wonderful 'refuge' to come to....just to help sort out your thoughts, if nothing else....

The first thing that came to my heart when I saw your post was,
if we can somehow 'see' past the medical turmoil for the moment and just maybe try to visualize a new chapter, as tho this were a book of your life.
....You've just been thru a huge medical procedure. Without knowing the details involved, I'm going to try and center in on the fact that you had a 'tumor' removed.......wow. That tumor did NOT belong there...and now it's gone.
That helps to visualize your 'new' chapter......you've had that ugly thing removed and it no longer will be a part of your life.
I'm thinking (putting myself in your shoes..... ) it would sure help to keep the stress down if I were to focus more on the fact that you've just had a huge accomplishment done! Grab on to any 'positive' aspects about this that you possibly can.......do you have a good relationship with your doctor who's care you are under? I pray this is the case. I hope that deep down, you feel a sense of 'trust' with your medical team. They are skilled, they know your condition, and they are taking the measures to conquer this. This WILL eventually be in the past......try not to allow the sense of 'fear' to take over....just do whatever it takes to pamper yourself because of what you've been through....
I hope your doctor has provided you with the best possible pain relief options there are.
"Ice" became my very close friend while I healed from the incision(s).....a nice cozy fluffy blanket and pillows were always nearby.....and we're never too 'old' for a good ol' soft 'teddy bear'...... comfort is key....

Yes, you still have the other surgery coming up, but try not to see it as an aweful thing. It's the 'other' part of what is involved to get your life back.

What do you have for a support system there with you? Good family, friends? Is the pain you are feeling unbearable? If so, have you been in contact and does your Dr realize this.....were you told the pain would linger like this?.....
If it helps, then talk about what has you frightened the most?
If so, does this lead to actual anxiety and/or panic attacks....?

Peek around the different forums and make yourself feel comfortable with any area that you feel you'd like to address....there is an actual Post Traumatic Forum here....and so many others....
People here will embrace you and help focus on what will bring you the most relief.....but talking about our fears seems to really work medicinally....
Just know, people here have been thru some of the most frightening health issues there are...so you are not alone.
We do whatever it takes to try and stay on the 'brighter' side of our issues.
You've got Friends....
We're here,
Rae