I was prescribed Doxycycline Hyclate last week and the first night I took it, I had a fever of 100.4. It went down quickly but I had no idea it was from the anti biotic. I thought it was from my miscarriage. Then, I began to get HORRIBLE bloating, like very painful and constipation. I also began to noticed throughout this 6 day period, that anytime I took Doxycycline, THAT'S when I would have these symptoms. I have come to the conclusion that this medication is causes my fever, bloating, constipation and depression. I have also experienced chest pains 2 nights, night sweats and ringing i the ear.