Please help. I’ve had this plant for almost two years and...

Please help. I’ve had this plant for almost two years and kept it in its original pot. It didn’t seem to be growing much, so I transplanted to the new one in the picture and it started growing like crazy! However, it’s started to sag a bit. Is this normal? Do I tether it to a popsicle stick? Also, should the soil be packed down at all - like, a pinch?