Hi, Like you I have several problems with my spine and I have permanent S1 nerve damamge, I've tried many meds and at least 6 dif. anti-seizure meds and have had bad effects from them all.
I tried the lyrica when it came out and found it to give me much relief but I had to keep tirating up rather quickly and the more I would tirate the worse the swelling got not to mention being oh so sleepy, the swelling however became so bad I had to stop it.
Not to mention the more weight I gained it caused an increase in pain in other areas.
Hopefully the weight gain you are experiencing will taper off and you'll be able to enjoy the benifits of the pain relief.
Lot of luck,
Linda