I was in the same situation like u. Went to Thomson clinic for check up, doctor could not detect at all. No sac or baby could be seen.
Few week later there’s brown discharge, at tht time I was already 5 weeks and 4 days, went to NUH doctor , no sac is seen on the vagina scan. 3 doctors checked me to make sure and mentioned it could be etopic pregnancy.
I was worried , they took a blood test and told my HCG level is very high and there’s no pregnancy.
After 4 days I experienced the same thing, brown spotting. Went to check at A&E. By the time I was 6 weeks 3 days which I thought , but this time another gynae doctor scan me. There’s a sac.
But actually I am only 5 weeks 4 days In actual.
Sometimes the ovulation of your date is later than you count.
Wait a few more weeks.
I hope you are doing well.
Anonymous