I took this s h i t doxycycline, some incompetant doctor said it would be a good secondary antibiotic for my tooth infection that was giving me an ear infection and my lymph node was sore.. so I took this c r a p only twice and feel sick to my stomach shortly after. I stopped after 2. Well I still am taking the amoxicillan. Its been 2 days since I took the doxy and I feel weak and tired and sick to my stomach still. What the hell is going on?