Period 31 days late, 4 negative hpt's.

My last period started June 7th 2016. Today is August 11th 2016. My periods are fairly regular. I usually start either the 7, 9 or 11th of the month... Every month since I started my period at age 12. (25 now). I had one weird cycle in February that was 41 days long. Haven't had one since until now. No obvious signs of pregnancy unless I really make myself think they're there. Other than my torso feels like a big balloon. I have a wellness appt Monday. Has anyone else experienced this! If so, what was the outcome?