May Allah accept your ziyarah
Please ignore the dreams and don’t worry about this
It’s maybe Shaitan trying to impact you and place doubt in you
Ziyarah only brings goodness and thawab inshallah
Seek refuge in Allah before sleep through istiadha, be in wudhu, do tasbeeh of fatima before sleep, recite Quran and dikr and Insha’Allah these dreams will stop