Had 2 low-dos ct scans that show 3 nodules 3mm 4mm 2mm 5 moths apart they said not canceriuos had 3rd done 4 moths now they say looks like cancer how?

Need more details: You need to tell us where these Nodules are located ?(Lungs?)and how much have they increased in size. Unless they have increased to double their original size, I would not worry about it being cancer. Only if the nodule/s are bigger than 5 mm in size and getting bigger on 2-3 consecutive CT scans, we can not make a case for them being Cancerous. Please give us the above info, so that we can guide