Increased nausea and vomitting in week 12

Dear mommies, seeking your wisdom here. My wife was only feeling nausea initially before week 10, and in recent few days she has increased nausea, headache, and started vomitting. Few days back there is red spot appearing on face and neck area, but had disappeared since yesterday. We are actually looking forward to Trimester 2, but the increased morning sickness symptoms is making her feel depressed and I am not sure why this happened: shouldnt the symptom taper off?