How did you know?

So I'm 99% sure I'm preggers with #2 😍 I had two negative tests so far but I just kind of know....? I have light cramping without period, occasional dizzy spells, cravings, basic stuff I wrote off with the first lil bean as PMS. So my big question is how did you all know you were pregnant with the first or second bean? I mean I could be wrong and just getting excited prematurely, but I'm ready for either outcome.