hi tj, aw so sorry you are having such a tough time.
i started with anxiety, which led to clinical depression, and from what you are saying i would think you are suffering depression too.
why don't you see a different gp, and ask them what they think about you upping your meds.
citalopram takes a while to kick in, but i would say if you are not getting better on it, you may need an increase or even a change of meds, you will get there, one day at a time.
speak to another gp, if you have no faith in the one you have seen, it's surprising how you can get so much comfort from a sympathetic gp.
good luck and i hope you feel better soon xx