Having been born with severe congenital short sight I am I'm afraid very experienced with eye problems

Sorry to hear you have got the complications of pvd. This is an entirely natural part of ageing and in most people they never know it has happened - it usually happens in your 50's or 60's but if you are severely short sighted as I am then it happens in your 40's.
One of my eyes had same symptoms as yours and I too had to go to the eye clinic as emergency and my retina was fine BUT about 2 weeks after it happened I suddenly woke up one morning and it was as if my eye was full of cloudy lumps and another rush back to eye clinic and I had the added complication that my vitrious had gone into big cloudy clumps and was badly affecting my vision, I had to move my eye briskly from one side to other to get clear vision for a few seconds. So please do not ignore this if it happens to you. The only treatment for this is to have a vitrectomy where they take out the cloudy virious and replace it with synthetic but its a risky op for your retina.
I don't mean to worry anyone and as I say these complications are much more common in someone like me who has very severe short sight. thankfully my other eye did its stuff and the pvd had no effect at all to my eye which is how it should be.
I now have cataracts but due to the high risk of surgery for me personally I will not be having them done until I am almost blind ( I am partially sighted at moment) as I need to have nothing to lose and this is when they will do the vitrectomy as well.
As has been said please dont anyone ignore flashes in their vision especially if its like lightening at the edges of their vision and worse in the dark.