To be around the bend or more commonly Just around the corner, Just around the bend and Coming around the corner among more but similar variations. In my experience it normally means as soon as a weekend or a couple weeks away, relatively soon but not next day. Normally at least a week away but could be long as month or so.
To go around the bend, I have not personally heard. It depends what your implying, to go crazy, there are different sayings meaning to party or to imply a crazy person such as, From the looney bin, or Going to the looney bin meaning they are mentally crazy but normally used in a laughing joking manner.
I sincerely hope this helps.