Protected sex on Nov 10th. Dumped me via text Nov. 15th, 2010. Started menstrual cycle late for Nov (due to stress?). I am 4 days late to start cycle this month (Dec.) Noticed painless lump in lower right abdomen approximately two weeks ago. Could I have had a full blown cycle and still be pregnant? Could it be an ectopic pregnancy? I have no children and I have never been pregnant. Please advise/help ASAP.