Am I pregnet or not?

Jennifer
Ok so my last period was april.24th - april 31st I have taken 3 pregnancy test and all negative iv also had a blood test done this past friday and they said im negitive but the laddie had to ask another laddie to see if she was right iv been haveing pain non stop on my right hip/ grind area and nothing seams to help it out im a mother of 3 each 2 years apart my last child was born September.2013 we have had unprotected sex several times but he always pulls out right before he gets off iv not had a sonogram yet but what should I do?