I had unprotected sex August 21st. I took plan b less than 24 hours later. That Friday I start back on my bc. I am not sure when I was in my cycle, because I didn't have a period in June. I had side effects within the first week, but no bleeding. On September 2nd I had pinkish/red spotting when I wiped. That last till the 3rd. We are now on September 6th. No more bleeding, horrible cramps, still nausea and tightness in my chest area. I have taken pregnancy tests and they have come out negative. Are more symptoms Plan B or are they pregnancy?