I had PVD earlier this year. First a storm of new floaters and then flashes of light. This happened back in January. I still see flashes when I go into a dark room and the floaters are a huge problem for me. They are not going away. My brain is not ignoring them and my vision is much worse now. I feel like I am always looking through a veil. I hate it.
I hope you are under an Ophthalmologists care! The fact that you are still seeing flashes means that the vitreous is still pulling on your retina. The mechanical effect of pulling on the cells of the retina is interpreted by the cells as light, which is the signal they send on to the optic nerve
FWIW, you are not alone with a large amount of floaters. I have roughly cataloged mine into various classes, the names are my own: The Windshield Wipers - these are dark wipers that appear hinged from the top. The Ink Drops - these are small round opaque droplets that float. The Soap Bubbles - these are like the ink drops, but I see only their shell, I see light through the middle of them. The Fly Went By - this one (I'm not sure that I have only one), looks like a dark fly buzzed right past my face. It makes it difficult to know when a REAL fly went by, unless I look quick at where I think it went and see an actual fly. The Filmy Ghosts - these are veiled clearish distortions that sweep by. These most often bother me when I am using the computer, or reading, things up close. I suspect that they are always there, but in looking at things at beyond reading distance, I think the wider view tends to swamp them out. They will move out of the way when reading, but it takes an instant for them to get out of sight line. I think the Filmy Ghosts are located in the vitreous away from the other floaters.
Some adaptations I have created to minimize their effects, when possible - I use cruise control whenever I can driving. The looking through the windshield, then mirror, then speedometer, etc. round and round, sets everything moving around. The less I need to look at the speedo, the less total floater movement.
I make an effort not to follow the Ink Drops or the Soap Bubbles. It's so easy to focus on them, which by pupil movement keeps them agitated and staying in my direct line of vision. If I just keep looking where I need to instead, they will slowly float downwards with gravity out of view. But all it takes is just an instant to forget and follow them, and they pop back up, to start again. When DW and I are driving on a trip, there have been some times with bright blue sky, that the Ink Drops are really bugging me, and I ask her to drive instead.
Whenever you move your pupils, the path light takes through your pupils through the vitreous to the retina changes. So you are looking through different areas of the vitreous, so can see different floaters, or see them move.
It's taken some years, but I can "forget" many of them, but they are always there, certainly if I look for them. And occasionally, the "forgetting" concept suddenly drops out, and OMG, what happened! Eeek! And then I tell myself, no, nothing probably changed, you just lost the "don't pay attention to this" catalog of items. And in no time, I'm okay again. They don't really "go away", I just get accustomed to them and their antics. But it's never like not having them.
. Said smart of me to get it checked just in case. 
