POSSITIVE OPK PERIOD 8 DAYS LATE 🤷🏼‍♀️🤷🏼‍♀️

Sooo we have been ttc baby #2 for 12 months.. ive never missed a period ever apart from when inwas preg with our daughter. My period is 8 days late i done a cheapy £1 asda preg test 4 days ago and it was 100% negative. Still nonperiod today so decided to try a opk incase my cycle was playing up and got this VERY possitive opk (ive never had a possitive this dark even when ovulating i use them every month) 😱🤷🏼‍♀️ could i be preg and this is picking it up.. buti done a test 4 days ago and it was neg please help someone 🙈😂