/diy/ - Do It Yourself

I need some help /diy/. I'm a pretty beginner woodworker, pics related are of the bedframe I've made in a campervan I am building. Problem is, now that I've secured it to the floor, the whole thing has some sway to it. Pushing back and forth on it, the legs to the bottom and top supports have like a quarter inch of give. I had built another bedframe before with a slightly different design and used just butt joints and screws drilled in diagonally and whatnot and somehow that was more stable. Here I went with pocket screws after read they were stronger than screwing into endgrain and now it has a ton of wobble. What should I do? I'm open to rebuilding it as 2x3's are fairly inexpensive but unsure why I dungoofed in the first place.