My boyfriend and I had unprotected sex on Sept. 9. I planned on buying a Plan B pill immediately but my little boy got put in the hospital and I forgot all about it. I didn't end up taking the pill until Sept. 13. Online it said the pill could be taken up to 5 days after sex, but each day the effectiveness decreased dramatically. A week later I had brown spotting that was light. I spotted for 2 days and then it stopped. After that I only noticed it when I wiped. During that week my nipples were hard all the time and extremely sensitive. It hurt to take a shower, hold my little boy, and when my clothes rubbed against them. I had a few dizzy spells and felt nauseous a few nights but no vomiting. I've also been getting out of breath just by walking. My boobs are no longer tender and the nausea had gone away, but the dizziness and shortness of breath remain. My period is now a week late and my cycle is always regular and comes when it is suppose to. Should I be concerned or wait it out?