10 weeks and feeling different, sad

Hi there, today's the last day of my 10th week. Im so worried as Ive been feeling very different today. First I noticed temperature drop, yes I know u shouldnt temp since bfp but cant help checking. My belly feels cold today as well. I also had an increase in appetite (before i couldnt eat much i was.bloated as hell) and today nothing. I didnt have many symptoms but I feel like my nausea stopped (it wasnt strong from the start but it was there). A few days ago I felt like af coming and it would be just around my ovulation time. Any positive stories girls? Please say something... im scared to think about the reasons :(