I had protected sex with a condom on Dec. 17 and to my knowledge it did not break. Two days later on Dec. 19, I took Plan B just in case. About two weeks later on Jan. 2, I had a period for 2.5 days with a medium flow. As of Jan. 15, I believe I ovulated because I noticed I had a lot of clear, thicker cm that was stretchy, and now today I have spotted with 3 drops of fresh blood. Is this implantation bleeding or could it be due to ovulation?!! I expect my next period around Feb. 2.....