Am I pregnant ????

Patient: My boyfriend and I met up on sunday (20/04/2014) and wer playing around. We did not have sex but he lying next to me and both of us masturbated. and as soon as he cummed after 2 or 3 minutes, he went got and cleaned up. The same thing happened on (11/04/2014). But he was lying on me and soing that time. According to my menstrual cycle 26/04/2014 is the 28th day from my previous menstruation starting date and according to the chart 12/04/2014 was my ovulation day. I havent got my periods today and I have also vomitted once. I am very scared please tell me what is happening !!!

Symptoms: Slight vomitting sensation