Lacking Clarity

And so my eyesight woes go on.  I've only been wearing my new glasses with a new prescription for about 5 days, and my vision is already starting to go blurry again.  My optician did say this might happen, but it is still very unsettling.  And it is putting my upcoming trip back to the UK at risk.  I don't want to go back if my vision is too compromised.  And I fear that is the way things are going.  What can I do to mitigate this?  It isn't cheap, but I have scheduled another eye exam next week - with the aim to get another pair of glasses with an updated eye prescription before I head back.  But even that might not be enough.  I am definitely feeling quite a lot of anxiety right now.