Doxycycline Hyclate and mental breakdown

I took this garbage for four days until I had to go to the ER for shortness of breath, chest pain, stomach pain, pins and needles sensation in limbs, hot flashes (felt like I had a fever) and blurry vision. The worst was the complete and utter mental breakdown, I became suicidal and had just horrible images coming through my brain.

It's been a week now and while the depression/suicidal thoughts have subsided, the anxiety, exhaustion, shortness of breath, and stomach pain remain. I'm curious how I can still have these horrible effects taking into consideration the half life of this drug. It should be out of my system now.

Any idea of how much longer this is going to last?

To everyone out there that has issues with doxycycline...
Now i fully understand the old saying that nothing is free in life.

I got it for lyme disease 7 days ago, and it was one of the free prescripts from my grocery store (great i thought). Little did i know how powerful this stuff can be. For the last week i have basically had severe headaches and wanted to give up on life. I didn't want to work out, didn't want to go to work, had chest pains, muscle spasms, and DEEP DEPRESSION....
now i know why this is free, because after it gets you so depressed, they figure your doctor will put you on something to get you out of depression, a money making drug. This is probably the meds talking still (i stopped yesterday after what felt like a complete and utter mental breakdown). Regardless of my silly conspiracy theory, i am glad i stopped taking it, and i hope that i start feeling like myself again.