If i eat a lot of fried pickles in one sitting can that raise my blood pressure or will i be okay? i had a past hx of prehypertension and it runs in my family

It could: High salt foods will raise blood pressure. If you do this just once it will raise your BP for a while and then it will come back to normal. If you make a high salt diet a regular habit then you can end up worsening your blood pressure on a more permanent basis.

Pickles: Pickles have a lot of salt in them so that could certainly raise your blood pressure

Whatever u chose to: eat,you should check your BP a few times monthly.If it's high,treat it.