Wondering. HELP!

amber
yesterday and a couple days before yesterday and a couple days before I had Milky CM mixed with EGCM. and now I have little to none now. What does this mean? I had BD last night and now am wondering if I can get pregnant. Since I had sex I have had like very tiny amounts of CM in my panties. Does this mean that I was ovulating while I had the mix of CM and now I all of a sudden stopped? I don't understand the "All of a sudden stopping of the lots of cm I had before sex" but since I had sex why did the amount of CM drop drastically?