Pre-op assessment

I’ve posted here a lot now about every update I get haha (F22, NHS, London), and I’ve just finally heard that I should have my pre-op assessment in just less than two weeks :D
I was wondering what are peoples experiences with the assessment?
I was referred for an ablation by an EP in June so I’m also wondering if they can make me wait longer for my ablation after this? :( The lovely guy on the phone said the ablation shouldn’t be too long after the assessment but can they push it back if I’ve had less symptoms in the last few weeks compared to the start of the year?
(I collapsed twice, once in march and once in may and have been collapsing on and off 1-2 times a year since 2020) and to be honest, the UK heatwave has made me essentially catatonic haha, I’m not taking the medicine they gave me because pills stress me out and they told me the other pills I had been prescribed (and had been taking for quite a while) shouldn’t have been? So I’ve been trying to not really move for the last month and tbf it’s worked, I haven’t been as symptomatic but still get pain, palpitations, etc daily but now they dont tend to last more than 10 mins at a time wooo