I know exactly what you mean - I hid my illness from everyone for 15 years and couldn't talk about it for fear of being thought of as being weird. Only my husband knew. Slowly over the years when I'd recovered, did I talk about it more, and only last year when my son became ill did I open up to friends and family. It's surprising how many people close to me have suffered with the same.
You need a doctor you feel you can talk to and be comfortable with. Don't worry though, because I bet ost of us have had exactly the same symptoms from anxiety, weird thoughts, fear of losing control, emotional, panic attacks, depression ..... all of which brings more anxiety on and your mind is never still.
When you're depressed etc your nerves become 'raw', ready to fire off at any provocation. Your thoughts can turn inwards and you scare yourself, you get panic attacks, and you get caught in a viscous cycle of fear-depression-anxiety-thoughts etc. Anti depressants and especially SSRI's help to break this cycle by hanging onto your serotonin (your happy hormones) before they're reabsorbed into the brain. Serotonin makes you feel happy and some people have a low level.
Once the medication starts kicking in, anxiety eases, depression lifts, the constant thoughts ease and you generally feel lighter and like your old self again.
Maybe you should stay on Citalopram for a while longer to help the acute feelings you have at for the moment?
Australia!! How exiting! :-) Ok .... so this is happening in 5 weeks. So maybe it is best to stay on Citalopram for now and try again after you've come back? Don't put a timescale on yourself because you may not be better by the time you go, but just accept that you're working towards recovery like any other illness. You may possibly take your illness with you to Australia and bring it back again ....... but that doesn't mean you won't get better. You will, but the medication will work in it's own time. For now it'll help ease what you're suffering at the moment.
Its best to obviously talk to your doctor about your medication as she's the one who prescribed it. It's not for me to say really, but am only looking at ideas. Is there another doctor in the practice you can see instead maybe? Can you ask to be referred for counselling / psychotherapy? Don't worry, they're there to help and it's best to be on the waiting list than not at all.
Have you thought about reading some books? I read all I could when I was ill as it helped to unravel the mystery a little. Dr Claire Weeks books Self Help for Your Nerves etc were some I read. I know not everyone likes these books, but they helped me immensely.
This is a very common illness, so you're not alone. It feels isolating I know x
You could even write down how you feel when you see your doctor - it helps. My son couldn't even talk when I accompanied him initially - he opened up to me as said he could tell me anything as it wouldn't shock me.
You our need to sort these meds out at the moment. The sooner, the better.
K x