As the problem is cyclical, I think harmonizing is always worth trying. Shaoyang type symptoms during menses makes me think XCHT. The blood is weak so the yang surges upwards to the head. It fits the nausea and vomiting.With the soft lower abdomen, she probably would end up needing something like SQW, but I think she needs harmonizing first. With the tight left cun I’d add GZGCLGMLT