Random pregnancy symptoms.

Patient: I had a miscarriage just over 2 weeks ago. It was a missed miscarriage. I instantly lost all pregnancy symptoms and the ones I had had were very light. About 4 days ago I felt very pregnant, like I did with my first pregnancy with my little girl, I took a test today and it’s come back positive saying I conceived a week ago. Want I really want to know is, can you loose all symptoms of pregnancy after a miscarriage and then they return again with a vengeance a few weeks later without being pregnant again?! Thanks