I'd take some time off the pre, stims, etc anything that could interfere. Also consider a week of deloading. If you want to try something different and can get a hold of it, try Antaeus Thunderbolt
I keep reading good stuff about this GlycerGrow 2 might have to pick up a container on my shopping spree and see how good it is.I notice the same with all kinds of pump products but I found a solution: I like 2 servings of GlycerGrow 2 better than any pump product I have tried. It gives me a different kind of pump that High Volume, Conqu3r Stim-Free and VasKular cannot match that also improves strength significantly because of how dense and deep it is.