Dropped phone...minor fall...touch gone bad! :(

after fall, phone has become troublesome. icons keep pressing on their own....screen and display seem fine....no physical damage can be seen...notifications menu drops down by itself....have to push sleep button to rectify the problem but it is recurring....did restore and put phone in FDU mode but problem still persists...sometimes the phone works and behaves absolutely fine but other times it starts malfunctioning...really annoying...phone not in warranty where i live.