Growth spurt at 18..???

Summer

Sooooo lately I’ve been experiencing knee pains and been feeling like a noodle and have been sleeping A LOT. Also since I was born I’ve had poop issues and would go weeks without pooping haha. But lately I’ve been pooping every day but it isn’t solid. And isn’t diarrhea. Also I been having no appetite for food but before hand I was eating everything. Normally a girl stops growing 2-3 years after their first period and mine was at 13. So I have no idea what is going on. My body feels reaaaalllly weird 😭 someone explain