Don't take random medicine, OP.
I don't anything about the meds you've mentioned, but second what PP said about taking old antibiotics.
As I've said, I have no medical knowledge, but your post has rung alarm bells with me.
Is it possible that you are having a bad reaction to the medicine the GP prescribed? have you still got the information pamphlet from inside the box of medication?
If yes, read through the list of symptoms. Do you recognise any from the list?
There might be some symptoms listed on there which mean, if you experience them, you should cease taking the medication.
Don't stop medication without seeking advice from a pharmacist/doctor though.
Also, it sounds like you are taking a cocktail of different meds which might react badly with each other.
Personally, I'd gather together all the boxes of medicines I'd taken, and get to the pharmacists or doctors, and explain my symtpoms. If you can't get to a GP, please go & seek advice from a pharamcist this morning.