I went and got tested by getting my blood drawn at my 12th week mark. The next morning I woke up to a patch of these brown freckle looking spots on the back of my right hand. I know nobody in the US reuses needles but I immediately thought by human error, could it be possible? I showed my hand to a dermatologist but he was unsure what it was. The test came back negative but now I have a fear. Should get retested or am I thinking irrationally? Also, is a 12 weeks test conclusive vs. 13 weeks?