A little concerned

I need some advice. I was really nervous I was gaining weight too fast and at about 10 weeks exactly I felt bloated, like nothing fit and that you could tell I was pregnant. Then I woke up this morning about 10 weeks 3 days and I don't feel bloated, I fit into my old pants and felt fine. I haven't had any bleeding or any other signs that I should be concerned. Has this happened to anyone? Does anyone have some idea of what may be happening?