I am so sorry for your loss and family stress plus more pain. Stress does impact pain so yes I feel it could contribute to why you are feeling worse. I try to keep as stress free as possible but of course that is so hard in every day life. I am not sure if it is cause one is tense it causes more pain or if mentally it just makes it harder to cope with condition when more is added.
Can you tell your family that you can't take on so much and need help/support? Are there ways to help you relax such as calling a friend,taking a bath,etc?
When I was increasing neurontin I felt in a fog too. As time increased though it did lesson. Neither of those meds helped me for sleep though even sleep meds don't. Are you having sleep issues? Have you tried elavil,serequel,trazaonde,or a sleep med?
I wish I could offer more but hope better and pain free times are ahead