@catmint20906, your cucumber plant got huge!
@newyorkrita, I think
@catmint20906 was advised to hand pollinate if her cucumber plant turned out to be gynoecious (all female flowers), instead of the type that produces both male and female flowers (monoecious).
It looks to me like those are male flowers, which is good news, because that means yours isn't gynoecious! So the female flowers should be coming soon.
