negative home pregnancy tests but 4 week pregnancy showing up on scan? can anyone advise me what 2 do? im so confused. i wen 4 a transvaginal scan on thurs to confirm if i had PCOS as my periods have been very irregular for the last 2 yrs. at the minute i havnt hada period from the end of november. i was v surprised wen the sonographr told me the appeard to be a 4 week pregnancy, she showed me the sac as i didn belev her lol i hav since thn takn 3 home tests, 1 thur evenin, anotr on ffri mornin and jus again tis mornin bt they hav all showed up negative. am i pregnant r did the sonographr mak a mistake? i have no symtoms tho i did back in november but doc tested me 4 pregnancy thn but was also negative. could i have been thn and lost it? could that be whats showin up on scan?