Hi, I last had protected sex on the 27th of May, from the 8th of June to the 19th, I had experienced nausea, stomach pains and lack of appetite. During this time, I had a period which was lighter than usual but lasted for longer but very light. I was due my period on the 9th of July but have not yet got it. I have taken several pregnancy tests from the 9th of June to present day, but have all been negative. Am I pregnant?