January 20th symptoms and conditions

I was prescribed Doxycycline Hyclate 100m for acne on January 20th 2009. Then, on February 6th, I took the medication at 11:00 only to wake up at 11:40pm with severe chest pains. I have never had anything wrong with me heath wise and the first thing that popped into my mind was the medicine. I went to the doctors the next day because the pain had become so severe and i could not eat or drink anything (even water) without feeling a sudden sharp pain. They did an x-ray and found nothing wrong. I was told it was probably anxiety and this medicine had nothing to do with the chest pains. I
went ahead and took it again last night only to still have chest pains so i decided to do research on this medicine and came to this where i found posts in which similar things were experienced upon taking the medication. I have just stopped taking the medication today and am hoping for the pains to go away.

I was given 20 mg of Prednisone for 10 days for a rash and joint pain.
The pain went away and I felt great the rash got a little better. Two days ago I took my last pill. I woke up that night and my knees gave out. By morning I was great! Next night I woke with knee problem again had to slide down the stairs to the living room. I got to wondering if the knee thing could be associated with the Prednisone. I got on line and read all this terrible stuff. I am so Horrified! Today I am in pain like my body is bruised and my face is swollen a little. I have acid reflux as well. Non of this is typical for me. My knee thing is ok again, but I am just appalled! I have no MED insurance. I hope this isn't the beginning of worse things I am not taking that drug now. The Dr. didn't say I needed to taper...

I hope I have not damaged myself by taking this drug! My heart goes out to all of you! My question is - Why are the Dr.'s prescribing this terrible drug?

PLEASE PEOPLE, LIST YOUR PROGRESS! DON'T JUST POST A COMPLAINT AND NOT FOLLOW UP.

However, here's what happened to me. I took one pill of levaquin on january 20th, 2007. One hour after taking the pill i felt my heart beating hard. I had night sweats and hallucinations and i refused to take another pill. The next night I awoke breathing heavily. My arms felt havy, my arm pits felt swollen, and my left leg, my calf and heel were feeling tight. I am only 31 yrs old and a non smoker/non drinker, and I thought I was having a Heart Attack. I went to the ER and everything was normal... EKG, Blood to oxygen levels were fine and so forth. However, the symptoms subsided after a week, then suddenly returned on februrary 16th... heart pounding very hard, sense of anxiousness, dread, confusion, left arm hurt, left leg felt heavy and hurt once again. So went to a cardiologist... he took an echo, and ran some blood tests... everything was FINE!!! I don't understand this at all. I am no feeling better and its march 1st. I really hope the side effects don't return once again. My heart is finally beating ok. Any one else with similar side effects? AND DO THEY EVER STOP!!! LOL... GEEZ. I only took ONE PILL... Also, I will check back in after a month and update all of you on my progress. Unlike these other people who post these horrible side effects, and never repost.