I'm assuming chemical but still hopeful... any insight please

Je
So I've posted my situation throughout this week a few times and now I need some insight again ...earlier in the week I was getting very faint positives along with pregnancy symptoms and some negatives, my period is always regular but this time after being 4 days late I get spotting then a heavier flow but for only one day! And now on day 2 random spotting , test today is negative... my doctor told me to wait a week to see as any bleeding less than normal can still be okay ... has any one had this happen and ended up being pregnant?! I'm so confused as to why I'd bleed for only one day, still having symptoms too...