Not baring weight/ cerebral palsy

Hi my almost 6 month old won’t bare weight for more then a couple seconds and one bears better then the other. He rolled over from back to front but not the other way yet, but he’s interested in toys, he passes them from one hand to the other pushes his chest off the floor at tummy time also put his but in the air, and pivots, he’s social, smiles, giggles, babbles, tries to mimic but not very good at it, shows affection. Point is, he’s meeting most mile stones but anytime I even look up how to encourage I’m to bare weight all that pops up is cerebral palsy, so now I’m sick to my stomach in worry, I have an app with his doctor in about a week.

Has anyone experienced this and they were just late?

What did you do to help/encourage them to bare weight ?