Emmie, I took Tramadol before I got my arthritic hip replaced last summer, as no other pain relief was effective.
I found Tramadol to be very helpful for the pain in my hip, thigh and lower back.
Like you, I was worried about side effects but decided to try it as I was desperate to get relief from the arthritis pain.
In the first couple of weeks, I found that it made me sleepy, and secondly that it gave me a feeling of "other-wordliness" - that is I felt as though I was drifting through my days without interacting with the world. That is a strange description, I know but it is the best I can do to describe the feeling.
And thirdly, I felt as if my footsteps were on foam - the ground seemed bouncy when I walked.
I found these effects very strange but I persevered with the Tramadol, and did not drive or even go outside for two weeks. By that time, the effects had lessened considerably and I felt confident again.
I stayed on Tramadol until my hip operation last summer, then gradually reduced the dosage and was off them again by Christmas.
I don't feel that I became addicted in any way.
I would say, if your pain is interfering with your life, give Tramadol a try. Be prepared for strange side effects for the first week or two, but these will diminish and hopefully you will feel a great benefit in relief of pain.