Hello Omya ~ I'm so sorry you're suffering so badly.
Please go ahead and take the new medication. You will be just fine. The doctor would not have given it to you if it would clash with the Lyrica. Also the pharmacist has a kind of "alarm" that goes off if any medication does not go together, so when he entered your new medication into the system, if it clashed with the old, the alarm would have "gone off." He would have known. So you're okay.

Please take the new medication, okay?
I hope it helps to relieve your pain. Please let us know, will you? God bless and please take care. Hugs, Lee