(25M) Just prescribed and took my first venlafaxine last night before bed, starting with the lower dosage. I’ve never taken any medication for anxiety. Within an hour it made me shiver and eventually start uncontrollably shaking, like muscle spasms. My gf had to wrap her arms around me to calm me down. I was able to sleep but this morning was awful, I felt nauseous, had some diarrhea, and increased heart rate. Kinda made me feel more anxious tbh. I’m feeling much better this afternoon though. My thoughts are more pleasant. 
Should I continue taking these?? I felt so weird and scared