Anxiety can cause our thoughts to whizz round until we don't know up from down!
Firstly, does your GP know that you are going away on holiday? I would go back and ask for something 'quick' for the anxiety, i.e. Valium or one of the other short-term drugs. Explain that you will try the Citalopram - what have you to lose? I take Cipralex, a sister type anti-depressant which are used for anxiety.
The sore in your nostril could be caused by dryness and continual wiping. I have one occasionally and it nips! hurts suddenly, I find Savlon works, applied lots of times a day.
The tingling may well be anxiety surges? Adrenalin causes my blood to feel hot as it courses through my veins! and I get various tingling parts at various times. Also, anything in the arms/hands could be a trapped nerve in the neck which nips upper limbs when you turn your head. All kinds of probablitlies, none of them 'serious'.
Your blood results are 'within normal limits' so there's nothing urgent 'going on'. Anxiety can cause exacerbation of any underling 'stuff' which normally we wouldn't notice
…….. but anxiety causes us to focus on how we feel, good nor not!
Relaxation therapy can help but needs to be practised 10 mins every hour! to get into the habit of using the therapy to counteract the anxiety surges. Also eating correctly can prevent the anxiety surges as it keeps blood sugar levels even.