If you imported the new set of images in the same catalog, then those images should be there in Library module.
Click on All Photographs under the Catalog panel in left column and scroll down to look for those images.
If you created a new catalog for the new set of images, click on File menu> Open Recent> choose the other Catalog name and check if it contains those images.
Thank you so much for your response. I am going to try that as soon as I get home. I will let you know!
PS, I did not create a new catalogue. Hopefully the wedding photos are still edited since I haven't exported them yet. I am still getting familiar with LR. I wasn't thinking when I imported a new group of photos; I should have made a new catalogue for the new set of images. But either way, the wedding photos are still in there somewhere, correct? :/
Yes, they should be there unless and until you deleted them manually.
And if you have not created a new catalog, they should be there is the same library.
You just need to look under All Photographs or, look under folders for the previously imported ones.