Phantom pregnancy?

I'm feeling a little crazy. 
My last period started March 14th and ended March 20th. It's May 4th now. 
I have headaches, lower back pain, sore breasts, increased sense of smell, late morning nausia and moodiness like you wouldn't believe but I have had 4 no tests.
Am I making myself have these symptoms because I want to be pregnant? Why didn't I have my period all of April?
I'm frustrated haha