Help answer my question on bbt please

Hi I have read so many posts about bbt and I’m more confused then ever I have tried to google my question and no exact answer so I will ask here.. I know that if ur temp stays elevated for 14+days it’s a good chance u might be pregnant. I know u can have dips etc , more question is can I have dips more then one like on my chart attached and be still in with a chance of being pregnant as long as no dips go below my cover line? Or does more then one dip even above the cover line rule me out this month?