I'm no expert by any stretch, but you are probably fine. What fertilizers/nutrients are you using with the plant? Is it getting enough water/drainage? Any visible pests? Are there the start of any spurs on the sidearms? My Chinook plant has some long leafless sidearms, but have since sprouted some. spurs and are covered in them Some of them are 2-3 feet long.
My Nugget didn't flower until late July early August. I couldn't harvest until late August or early September, I can't remember which. Iirc about the plant last year, it had some spindly sidearms until the spurs came, kinds like the Chinook, then it filled out nice and plump. This year, she's attempting to take over the whole garden with her bushiness.