Suggest Treatment For Severe Headaches When On Levonorgestrel

I had been on losesonique levonorgestrel back in november-february for menopause symptoms of anxiety and irritability. I started to have severe headaches and became very concerned. My period had stopped during the february dosing, now I haven t had a period since and I am gaining weight pretty fast and I haven t changed a thing about my daily food intake. Should I be concerned? I already took a pregnancy test and it was negative.