I knew early with Jess as I had m/s four days running so I went and had a test. With Kat I had terrible cramps a few days after conception and I didn't put two and two together untill I had the same thing the cycle I fell with Jess so.... The cramps were horrible and even panadine forte didn't take them away completely.. So at least now I know what to look for for implantation sign. I know I may not get it every pgcy, but the past two I did so that's gotta mean something.