Need advise

Hi all, i need some advise here. I had missed my period for about 8 to 10 days. Did pregnancy test twice this week (wed and fri) and it turned out to be positive. My last menses was 7th october. However, yesterday ard 2pm theres blood stain which is like the size of 50cent coin. It stopped but ard 8pm, there was brownish stain on my pantiliner. Is this common? I havent go to polyclinic for check yet to confirm pregnancy as i guess its still early to detect. My husband told me to wait as the 1st pregnancy i had blighted ovum. Please help.