Two days late

My husband and I have been ttc for 4 months now, after being on birth control for 6 years. After stopping, my periods regulated themselves right away, and my periods have been the normal 28 day cycles. Up until now, I'm two days late and have no signs of AF showing her face. It always comes on time, never late at all. I have slight cramping the past two days, but it wasn't normal cramping. I've been nauseous for the past 2 days as well. My boobs are a little sore, but not to the point where they can't be touched. My lower back is killing me, and I've had headaches on and off for the past week. Took a clear blue digital test this morning and it was negative. Should I wait to test again in a day or two and uses different test? If so, which is supposed to be the best kind to test with?