Girls, can you tell me if it's teething or something is bothering her?…

Girls, can you tell me if it's teething or something is bothering her? She wants to sleep but can't fall asleep and gets upset, she pulls on a toy then gets upset, she sits all day on the potty. Everything is normal on her hands, only when you put her down, the crying starts, it's like she's only three months old, teeth are still coming in and at this age they practically sleep all day, ours just won't do it.