Me and my boyfriend are trying to conceive. We had unprotected sex on Dec 20 and 21st. I have normal periods that I predict every month (sometimes im usually a day or two off). My periods start of heavy and then change to light flow. My period is scheduled to start around Dec 25th or the 26th. I started spotting on the 25th and I had some bleeding on the 26th. With this cycle my flow is very light. I normally have to change pads a couple times a day and wear two pads at night now I only have to change pads once or twice a day. My cycle was over with on the 28th and now im spotting again. My period last anywhere from 6 to 7 days every month. Could I be pregnant?