Photos lost

I used to have an iPhone 4 and now bought an iPhone SE. I had used the new phone for a couple of weeks before I connected it to my MacBook, and when I did, it asked me if I wanted to sync the new phone with the stuff from the old one. I clicked yes, and now all the apps from the old phone are in the new one and all that, but what happened to the photos I took with the new phone? I can't find them anywhere, and my computer did not ask if I wanted to import them first before syncing... Are the photos lost?