Facebook login problem

Hello,
I needed your help. I can't log in to my facebook account. I've tried to "forgot password" and I made a successful change of my facebook password. After that, I can already open amd use my fb messenger of this account, but the facebook itself (i mean the facebook app where you can see your timeline and other things) it doesn't open. I've already entered the correct email address and password but it is just loading for a few seconds then nothing happened. the facebook has no response or any message why i can't open it. please help, it was my first time I enconutered such kind of fb problem..