7 year itch ?

Does anyone ever come to that point in their marriage and look back and wonder if they did the right thing ? I realize i've only been married about a year and a half and everyone says the first year is the hardest but when does that end?... when is back to normal supposed to begin ?? I've heard about something called a 7 year itch ... a point in the relationship that goes awry (we're in the seventh year now) and wonder if this is the feeling i'm feeling .... I feel like i've lost the connection , things just aren't the same as they used to be and i don't know where the line is to be crossed at this point. Has anyone else experienced this ? Is this just a hump I have to get over ?.... i just don't know where to draw the line , or how long should I let this go on ...all i know so far is that things just aren't the same ...