Topomax and Side Effects and Should I Stay on It???

Hello I am starting to take topomax once again after 8 years. I have neuropathic pain and am taking 25mg twice a day. This is the fourth week and did not think I would make it this far. As a matter of fact I quit for two day and am now back on it. It does help with the pain but have found since I went back on after two days off about four hours after the first pill in the morning I get very very sice for about 2 hours like a huge case of the flu only really bad and then it goes away?? Now I do not remember this happening the last time or any of the other nauseau I had the first few weeks or flue like symptoms. However I feel my body is starting to get used to it. I am fighting however mentally as to what I really want. Do I want to take this and feel tired all the time but have less pain?? I know my Doctor will want to increase this dose as I remember I took 100 mg the last time and will not go up from this 25 mg twice a day. So I have to decide what to do as I take an antidepressant and antianxiety embarrassing but I do. Any thoughts?
Thank you,
Suse4