Depressed

I have been so depressed here lately :( everything and everyone is anyoing me :( I don't know why! I just feel like crying all the time! This always happens when I come back from spending the weekend with my moms side of the family! Which I haven't seen my mom in 9 years! Could it be that being with them reminds me of her and leaving them reminds me of when she left me? I don't nessisarily feel like this is it but maybe it's my subconscious speaking?