Can I be pregnant

OK, sorry if this gets confusing. Dec. 30th of 2007 my period came, lasted 7 days, like usual. I expected to have my period Jan 30th of 2008, since my periods had been 30th to 30th of every month for like 6 months, well it didn't come. So I thought OK, I could be pregnant. Tests said negative, my period came on the 7th on Feb., it was normal. But then I didn't have a period for the next 4 months. At first I thought I could be pregnant even though tests said negative, because with my last 2 pregnancies I didn't test positive until I missed the next period. Well no pregnancy test was + and I had an ultrasound which confirmed I was not pregnant. Then on the 15th of June I had a period. Soooo, I once again expected a period this month on the 15th. Yeeeah it didn't come. So I thought, what the hec, I'll take a test. Well to my surprise, my Clearblue test said "Pregnant". I was shocked and happy. Then in the morning I decided to take the 2nd test, well this one said "Not Pregnant". My heart fell. So in the next 2 days I took 2 or 3 more negative tests. Then I got a negative blood test.
Here's the weird thing I keep having pregnancy symptoms. My breasts have been sore for the past 2 or 3 weeks, I crave milk like crazy, I've been having major charlie horses, I get hot and cold flashes, migraines, and unexplained irritation, also I crave meat. I was having lower back pain for a couple of weeks and a little nausea. So I don't know whats going on. I will be taking another test on saturday. Do you think I could be pregnant or is my body out of wack?

[Kim1989]

if you got a negative blood test i would say your not pregnant

[tarajanes]

It sounds like your cycle is all over the place,if you have had negative blood tests,then i would agree with the pp,your not pregnant.