I have been taking 20mg Propranolol for 2 weeks, now, 1 tablet morning and night, they seemed to be helping as I wasn't eating or sleeping but this started to get better, but I have noticed the last two days that 2 hours after taking the morning one I am feeling very very tense, so much that my shoulders ache and I feel like throwing something. Has anyone else experienced this, my doctor told me to take 2 a day but on the box it says up to 4 a day as required, I am wondering if the tablets are making me worse or should I take more?