Are the side effects of the drugs Pregabalin and Asertin, which reappeared a month after the start of treatment with a mine?

Hi it's been a month since I take pregaballine 75 mg twice a day and asertin 50 mg once a day, at first for the first few days I felt side effects then I felt better my heart calmed down a little I felt calmer but now I feel bad again my heart is pounding, I have a feeling as if inside I trembled I can not focus, concentrate in general and all the time my hands are shaking or does it mean that the drugs are starting to work and it will soon pass? Do I have the wrong medication and the psychiatrist should change?