Back Pain With Hand/arm/finger Numbness During Sleep Periods

If anyone has any advice, I would be so grateful! I am 33, female and in excellent health (as far as bloodwork goes). My mch is slightly high (34.1) and my potassium is a little low (3.4). I have been experiencing numbness in my hands, arms, fingers just about every night for over a year now. I have been to a neurologist and had a nerve conductivity test, which ruled out carpal tunnel. I do not have diabetes or any other diseases that I am aware of. At the time these symptoms began, I was taking a diet pill called lipovara and prior to that I tried lexapro for a couple months prior to the symptoms. Also, I about three months before the numbness, I was involved in a car accident, where someone hit me on the highway, but I did not feel any pain from it at the time or afterwards. I have been to a chiropractor with no improvement. Massages feel great, but are expensive, so are the chiropractors. It is very upsetting to wake up with my hand asleep, annoying too. It doesn't matter what position I sleep in or which mattress, it happens everywhere. I have noticed a couple lumps on my lower back, one on each side of my spine. It hurts to stand a long time and to bend over sometimes. Does anyone know what is wrong with me? Thanks!!