It took me quite a few months of repeated bloodwork for the diagnosis to come through. Sometimes it's like looking for a needle in a haystack. Sometimes the symptoms are so vague that they are easily overlooked. I'm glad you are following up with tests. I can imagine how scary this must be especially after your grandmother had it. I'm so sorry to hear that. These days we have much better outcomes. I'm rooting for you! I hope you find an answer soon.