Right now, I haven’t told my boyfriend about being late until I find out some hard proof (something…

Right now, I haven’t told my boyfriend about being late until I find out some hard proof (something confirming I’m pregnant or my period lol).. Mainly bc if I am, I want to make it a special surprise. Is that wrong? Should I keep him in the loop? I think he’s suspecting something bc I told him I was getting my time of month soon (like a week ago) and still nothing.