That explain to me she is on the wall often cause she is trying to absorb the heat from the lamp above in the the back of the cage,I will recommend set up some horizontal branches asap and position the heat lamp towards the front or middle,so she can peacefully enjoy her basking without standing in the awkward position on the wall trying to get some heat,she might be cold so she is shivering and it will be better for u to take her to a chameleon specialist vet with some type of test ....fecal , X ray etc....also in couple month she will need a laying bin for her to lay infertile eggs.