macsweeper deleted photos

Hello,

I unfortunately am a victim of macsweeper. I am not even sure of how it was installed on my computer, but with the help of some amazing people that I spoke with from Apple Support I have removed it from my mac. I have been having trouble with some of my photos in iPhoto (version 9.6.1), there are some thumbnails that are a gray box with a white dotted line around it. I did try the suggestion of holding down the command + option buttons during startup and tried to rebuild thumbnails, along with all of the options without any luck.

I came across a post from someone with the same issue and in one of the responses someone had asked if they had used any type of sweep software or had macsweeper. I am nervous that I have lost some of my photos/videos due to the malware. Is there any way that I can restore my photos? I do have time machine, however I can not find the originals anywhere. Also, the iphone that had the original pictures/videos was stolen.

If anyone is able to help I would greatly appreciate it! Thank you in advance 🙂

Jess W