Hi, This May Be A Little Confusing. I Was Having

Hi,
This may be a little confusing. I was having unprotected sex before I got married on June 20th 2015. The last time before that I had sexual inter course was on the 19th may and 20th may, 20th June and 1st July. I had my last normal period on May 27th. I was then taking utovlan from 17th June to the 7th July. I had a very light period on the 11th July. I've been feeling a bit nauseous etc. is there any chance I could be pregnant. I did a test on 19th July and it was negative.