Doxycycline Hyclate and workout

I was on Doxy for a month and a half due to mild acne. For the first month, I felt fine, however when I went to refill, things became awful. Although I did not notice the nausea or tiredness (because I took it before going to bed), I began to feel episodes of dizziness, confusion, inability to concentrate, and anxiety. I continued taking it because I had not been informed that these might be side effects. Eventually I had 2 panic attacks where my legs shook uncontrollably, I felt I could not breath, became really cold and sweaty, had racing thoughts that I might die, and felt incredibly confused. The attacks really scared me to the point where I was afraid of having another one. When I went to the doctor, they ran blood tests, told me everything was alright, diagnosed me with panic disorder, and gave me medication. Even though I told them I was taking this medication, no one ever told me this might be side effects. I have never had any mental problems and am an upbeat, happy person. While taking this, I had severe anxiety and bouts of depression where I felt like crying for no reason. I was afraid to be alone, I was afraid to workout, and afraid to leave the house. I could not study and thought my entire life was spinning out of control. I've been off it for 2 days and am feeling much better. Anxiety has decreased and depressive episodes are also decreasing. There should be better research on these drugs to inform consumers!

Have been on Doxycycline Hyclate on and off for the last 6 months for acne treatment. I hadn't been enjoying the way the pills made me feel so I had neglected to use my last bottle of sixty (100mg 2Xdaily) until my acne flared up this past holiday season. On Friday the 18th of January I went to workout, came home and cooked myself a big breakfast, and then decided to lie down for a nap an hour later. The bottle was next to my bed and I hadn't taken my dose for the day, but I had just eaten a big meal so I wasn't too worried. I took the pill w/o water and lied down. BIG MISTAKE. I woke from my nap about 90 minutes later with the most intense burning sensation I've ever felt. It was just below my rip cage in the center of my body (I think it's the flap between the esophagus and the stomach) and now it's Tue. the 22nd of January and it still hurts every time I swallow and especially when I eat food. It sounds like I'm not alone with this problem and I would love to hear from somebody if this is temporary or what their Doctor told them to do. Thanks for your help.