My period is 26 Days late

My periods are normally on time but sometimes they get to be 12 days late. But i havent had my period since July 12th. Here are some symptoms im having: Hot flashes, fatigue, constipation, bloating, gas, and nausea. I spotted on August 17th and then no more blood it was really light pink. Please tell me if i should take a test, go to the doctor, or wait just a little longer?