Symptoms but not pregnant

Has anyone else had symptoms like they are pregnant but tests and period arriving you know you're not. Do you think you convince yourself you are and pay too much attention to things that you wouldn't have normally noticed? I had backache, headaches, twinges in my tummy, broke out in spots (which I never do) but have just started my period so can't be? That 14 day wait is a killer! TTC#1