— So, Leonard, how about it?
— You know, Penny, we'd love to help you, but Raj is going through some stuff right now.
And besides, he doesn't drink, so...
go through sth. (to experience or suffer sth.) 经历，遭受
The child is going through a difficult phase.
They went through the agonies of war and famine.
I wouldn't gladly go through that unpleasant experience again.
Their marriage has been going through a bad patch.