Congratulations on the pregnancy. I'm sure you are very happy but at the same time, you have concerns which, is very understandable. I don't know much about morgellons at all. I found this link and thought perhaps you may get some useful information from it. Perhaps you could even have a chat with people who have gone through pregnancy and suffered morgellons. You may well have seen this site but I thought it was a good way to start.
Is this your first baby?
I've read Isotretinoin must not be taken during pregnancy because it causes birth defects in humans.