I had unprotected sex on 20th December but took the morning after pill Levonelle on the 21st of December. I waited for my period since I couldnt remember when it was due and on the 1st of Jan I got what I thought was my period.. I bled for 3-4 days but it was more like spotting than a period.. from the pharmasists advice I took two tests after this which came back Negative. I am confused as to if there is any possible way I could be pregnant. I have an Endoscopy in 5 days so need to be 100% sure. Any advice is greatly appriciated.