8 weeks-less symptoms

Jo • Mother of one, born Dec 2015. IVF second cycle success.
I'm 9 weeks tomorrow and this past week in particular I've noticed I'm not as bloated, cramps have eased right off and boobs still aren't sore. I'm worried. Had a scan at 7 weeks and all was great. Is it possible for something to go wrong without spotting or blood? Any advice??