The post-op holding pattern is the hardest part, because your mentality is really the only thing you have any power over. I had hemmorages in both eyes at once and had one vitrectomy per eye, plus a lens reimplsnt and a capsulectomy, all within a ten month spread. First vitrectomy, I had to position face down for four weeks. Second time it was seven. However, I had had bubbles in my eyes instead of liquid fill.
I tend to doubt there is blood inside blocking your vision, as removing the blood is part of the point of doing the procedure. My first two guesses are swelling and dilating drops. My surgeon used dilating drops to help with pain control, because keeping it dilated prevented the muscles from trying to work against the sutures.
Hang in there. It's very early days. Give it time.