A couple of months ago I was waiting for an op and thought it was maybe panic attacks about it
Had the op now, and twice in 2 days I’ve felt like I’m going to pass out, really suddenly
Before my op it happened so badly I had to ring 999 then cancelled as I felt ok but really shaky
WTF could be causing it? I had seizures as a child and it’s a feeling like that, not dizzy but very much “I’m going to faint” and I’m petrified as live alone and I hated the feeling as a child
had a pre op with bloods, ecg, I have bloods every 12 weeks, I take iron and vitamin d as slightly deficient and my regular meds haven’t changed 
BP is normal and my pulse always sits high around 90-100