The first day of my last cycle was February 19, 2012. It was normal, nothing odd, maybe a little lighter, and lasted 4 days, my cycle is usually 28-30 days. We went on a trip to Puerto Rico, February 28-March 4th. We had unprotected intercourse on March 1st. We got home March 5th, and I noticed some brownish discharge only when I wiped, and on March 6th had unprotected intercourse again, I again had the brownish spotting only when I wipe. Nothing on March 7th, then on March 8th, today, I had some darker brown discharge after using the bathroom this morning, then again in the early evening, but there was more, and had a little bit of red in the brown. We are spotting....is this ovulation bleeding , mid-cycle bleeding, an issue with altitude change? Do I still have a chance of being pregnant this month?