Doxycycline Hyclate and tired and sleepy

The first few times taking this drug I had extreme nausea even though I had tolerated most previous antibiotics and pills pretty well up to this point.
I thought it was a little odd, but that it would pass.

The nausea finally did pass, but for the past two weeks I have been taking it I've been doing almost nothing but sleeping, and having extreme spells of tiredness.

Gradually every day has just gotten worse and worse than the next while on these pills. I don't want to get out of bed and lately have looked at the clock to see that I've been in bed for twelve hours at a time.

Now, I'm also in very advanced college courses. I initially attributed my sudden inaccuracy and inability to focus on the fact that I was just nervous about the courses, the material, but each day my concentration got worse, and worse and worse. It feels like I have ADD or something, which I've never had.
I felt like I was going insane when I could not even get through a page of material without wanting to jump up and shake myself around (also because of the numbness I got in my legs and arms). Not like me at all.

I have been dizzy, weak, incredibly tired and cold all the time, and entirely unable to focus all since I've started taken these pills. Unlike many of the other people's symtoms posted here, I've experienced severe chills and cold/ numbness in my whole body rather than heat? Except when I go in the sun, which then feels like I'm burning up.

Today was the last straw when I couldn't even get up out of bed, drive normally I was so dizzy, could not normally read one page of material, and the sun felt like it was burning my eyes out.

And reading some of the even worse symptoms others have had, this drug is not worth all the pain and possible permanent damage just to kill a few of these pimples.