I have been having many of the same symptoms while taking Doxycyc...

I have been having many of the same symptoms while taking Doxycycline for Rosacea. Sweating excessively during the day and night sweats. Aching stomach whether taken on empty stomach or with food. Tightness in chest and feeling of anxiety and very emotional. I think it's the Doxy, I have been tested for hyperthyroid, because the symptoms are similar. This med. makes me feel like I'm going crazy. Has anyone stopped and how long does it take for all symptoms to go away. Has anyone switched to Tetracycline and had no side effects.