Alice, pain is a part of life. Physical pain is bad but spiritual pain is worse. Much worse.
If your doctor said to take a medication, take it. Tell him about all the other symptoms you have.
Eventually you and I and your neighbor and everyone else who ever lived find that life ends. But every day -- no exceptions to that iron law -- we all learn something new.
It helps to start a log. Not a diary -- instead, a well kept log. Go hour by hour or day by day, but keep it as impersonal as you can. Put the personal stuff in your diary. That is why you have these records.
In your daily log, put down what time you got up, what hurt, how badly (1-10) what your blood sugar concentration is and how long it took you to get off the pot. Record all the meds you actually took, when you took them, and the results.
Log what you watch on TV, how long you spent on Yedda, and who sent you email. Write down all the letters you got, from whom, and a one line summary of what they said. Log down when you got bills, what you owed, and how you planned to pay them.
Most important, log down when you feel your emotional best during the day, and when you felt your worst. Relate that to the time you rose and when you planned to go to bed. Finally, log down what you ate and drank during the day.
Now, once a month, go through that log and mark down the patterns you see in your daily routine. Chances you will see a daily pattern emerge and secondarily, a monthly pattern.
That will tell you what to do. Take good advantage of the good times during the day. Nap during the bad times. Et cetera.
That was the way I beat PTSD. It takes an effort, but it works.