Confused...is it all in my head? i cant keep going on like this! ?

Last month my period was late and I drank parsley tea and woke up the next day bleeding bright red blood. This was May 20th. At the time I was urinating all the time and I had headaches and dizziness. After my period it all went away and I went to the doctor to get a blood test on the side of taking like 15 negative hpt's and one test at planned parenthood also neg. The blood test came back negative and I have not had any sexual contact the last week of April. Recently I've been feeling sick at times and I have no appetite. I was expecting my period to arrive last Friday and it didn't. But that week before I was having lower back pain and nipple tenderness. Since the beginning of June I have taken 6 hpt's all negative too. And I've never been one to look or monitor my cervix but I believe it is low and hard. Could parsley tea have changed my period? Could I pregnant?