Shoulder pain..

So I'm probably being paranoid.. But.. I have a pain in the front of my shoulder. I don't have any tummy cramps, no spotting or bleeding etc.. I've heard that this could be a sign of an ectopic?? I'm 4 weeks and 3 days... I do have a chest infection and have been coughing like crazy which I'm hoping could be related to the shoulder pain.. Anyone have any thoughts/suggestions?