I had sex almost two weeks ago. I am now getting all sorts of strange things happen. For about a week now I have been getting spontaneous bouts of stomach pain in my lower tum. Also, been really off my food and had feelings of sick. For the past 3 days I've also had diarrhoea. Not overly sloppy but enough for it to get over toilet seat. Eurgh! I've done a few pg tests but it's only 13 days since sex! Is it too early to be having symptoms?