What constitutes the 4th amendment

I was at friends, police showed up with a search warrant for specific items; sd cards, anything with an sd slot, laptops, cell phones. They had an arrest warrant for him, already drawn up, so they had viable evidence to charge him. He and I do not share property, that was not my legal residence. I was visiting, so I had a few bags and my purse. They asked us to step outside while they began the search for more incriminating sd cards of his. I feel that my privacy was tramped upon, because they did not have a search warrant or an arrest warrant, and I had nothing (no sd cards, no phone, no electronics) for "probable cause" to just go ahead and go through my possesions, they did not even ask if they had permission. They found prescription diet pills and a roach and charged me with them, when I had nothing to with the house/property/or crime they were dealing with. I need to know if that is illegal search and seizure.