Can't stop crying

Shari
Hi ladies,
Just a vent and some therapy really. Today I feel so down. I can't stop crying uncontrollably, can't concentrate and my work is suffering. Stressed beyond belief and  just want to curl under the duvet and hide from the world. 
No idea why I feel like this, today is no different from any other, I just feel so 
overwhelmed, hopeless and desperately unhappy.
I keep telling myself I just need to make it through the next hour in the hope I can get through this retchid day