What is the truth and what is a lie?

Just had a birthday dinner with my friend and got some news that I can’t seem to figure out…  I cannot differentiate whether she is telling me the truth… just a partial truth or plain, right out lie.  Alright, I can remove the plain right out lie part, I think.  I am just so confused sometimes and I then I tend to put it out of my mind.  I am getting very cold hearted… 

Tonight she told me that the doctors discover two more little shadows in her brain but the original one had gotten smaller. The first time I heard about it back in December, she did a biopsy and told me that it wasn’t cancer. Then, later on, she said she wasn’t feeling well due to the medication so I asked her again whether she was taking cancer fighting pills and she said yes. Before this dinner, about two weeks ago, she told me the doctor changed her medication and now she was able to eat without feeling nauseated and the new medication was very effective and the “thing” has gotten smaller. (It was described as similar to a piece of thin noodle with the length of about 2 millimeters.) Now, as this “thing” gotten smaller… two more appeared? (What the hell?) Then she said it wasn’t cancer.  I can’t feel any emotions… it’s really strange.  I need time to digest everything.