Doxycycline Hyclate and despair

I have been through hell with this drug, well i'm sure it was this drug, I have had minor anxiety in the past, but the anxiety i had the day after taking this was off the scale, I couldn't sleep, eat, or function in my life at all. I started to become very depressed and go into despair. I even had suicidal thoughts which freaked me out and is not like me at all. I was even taken to A and E at hospital it was that bad. I finished on Sunday and seen a bit of improvement, I was not as anxious and irritable. Today it has came back a little, I seem to have some mental confusion and memory problems also. It has been a long dark road, and I entered some scary dark places that felt horrible. Im usually so upbeat and busy. It was so not like me. I took this medication for 11 days at 100mg twice a day. Like I said i finished on Sunday, I still feel very unreal (dreamworld) depressed at times, no appetite yet and struggling to relax.

How long will this take to pass? please help I feel im going crazy

Can anybody tell me how long this lasts? I've been off it for a week and still no relief. The drug should be out of my system now. Any feedback would be appreciated.