Well, if you do the trigger point therapy, it is probably advisable to then stretch the forearm muscles by pulling the hands in directions to stretch the wrist and forearm muscles. In therapies such as ART, or Active Release Therapy, the muscles slowly build up micro tears and small lesions and need to be stretched out and (for lack of a better word) re-educated to allow them to relax some and not hold so much tension. That is another reason for maybe some foam rolling and or self massage after some of those trigger point sessions.
Sometimes pain and cramping in joint/muscle areas are caused by tension or a harder ability to relax that tension or an almost constriction of tiny blood cells.
Can I ask if you are a somewhat nervous person? (As I am/was at times and have the same kind of issues at times) Relaxing, more, less stress, some foods and or supplements can also help ie; mag or calcium at the right times etc. Too much caffiene or CNS stims for me, will at times have me overtensing in areas.
Also, the wrist wraps could help too, at least while you are doing the lifts.
Another question might be, what exercise(s) did you do before, or did you do grip type exercsies the day befored?