OP, I also have a health anxiety. I wrote that post fully knowing what you're going through, not because I thought 'Dear God, woman, pull yourself together'. I know all these spirals and intrusive thoughts – intimately. I have had health anxiety (to varying degrees of well-managed and unmanaged) since I was a teenager.
And I get it – I have young twin children, I work full time, I have a zillion and one things to do all the time. Managing a mental health condition takes time and space and effort that you often just do not have.
That you even booked your appointment and went is a HUGE deal. Do not underestimate that. You were shit scared, you've been shit scared for years, you've avoided it and explained it away, for years. But you went. You did it and it's over. WELL FUCKING DONE. And you should be bloody proud of yourself for doing that and you should mark it off as one huge step you have already taken in combatting the task of managing a health anxiety.
The one very, very meaningful and effective thing you can do is to stop reassurance seeking – googling, asking others etc – because that is overwhelmingly the number one behaviour in feeding the anxiety and perpetuating it. I get it – you are looking for relief in how you feel, because you can't stand feeling that way. You are looking to read something or hear something that gives you proof that you do not need to worry. Maybe you will, maybe you won't find that reassurance, but one thing is for certain – any relief you find will be very temporary, but the anxiety will grow.
When you feel the urge, do something physical – go and do the washing up, the gardening, sort out a draw of old clothes, whatever – just stop yourself looking anything up. Don't feed it. Don't even look at this thread – or instead start a new one for health anxiety strategies and support.