I am due to have teeth removed but scared, i need advice.?

Hiya i'm 23 years old from the uk scotland, and since september last yr my teeth bothered me with pain it stopped for a few months but in early january late december it came back with avengence so much so that i kept piling on the bonjela and the anbesol after two weeks of this i gave up and decided i needed to see a dentist even though am petrified of them. When at the dentist he said i would need two wisdom teeth out (no biggy) and 4 molars (scared now) thing is i havent ever had teeth out so he refferred me to a dental clinic for IV sedation. I had to wait awhile for that consultation i went to the consultation monday 8th she was very nice and took an xray and comfirmed that i needed 6 out told me that i would feel like i am drunk but not drunk and my boyfriend says i will be in alot of pain afterwards, i have stocked up on painkillers. But the only thing i am really scared about is the needle in my arm to sedate me as i am scared of needles or hearing things such as crunching sounds or opening my eyes and seeing a molar i know i will be drousy but how drousy? will i actually be able to hear things properly, or be able to focus on things. Also she said there might be bruising or swelling on my face?!?!!? am really terrified the actual procedure will take place the 3rd march :-( not really that long away just some advice please and try not say oh it will hurt oh you will be like this that and the rest when it wont be like that because i have a phobia on teeth. Oh i also suffer from panic attack, anxiety, and depression, i have always since a kid dreamt my teeth would fall out. So this is a nightmare for me. thanks :-)