Oh yes! :(, I thought I was having a heart attack at times. Die off comes in many shapes and forms and if you feel something unusual or out of the ordinary it may be a sign that you are not drinking enough water.
Something to consider so you are not disappointed if the doc does not find anything on your scan; 1), you are taking anti-parasite meds-if they scatter it won't be to your guts, but your muscles. 2)It's a parasites job to hide, and they do it well. There are plenty of people here who have talked about getting scans and nothing showing up...it does not mean you are crazy or don't have parasites...it just means they hide well....Best of luck to you!! And drink drink drink!!