My photos didn't develop and I have no idea why

Okay I'm posting here because I'm truly stumped as to what happened. I've been shooting 35mm for a little over a year now and I've gotten very comfortable with my camera (I'm shooting with a Minolta Maxxum 7000). I recently got done with a roll and I gave it to my developer to have them developed and scanned, but they came out 100% blank, like as if it was a brand new roll. I know for a fact I only had one roll of film, so I didn't swap it out with an unused roll, I checked and the shutter on my camera is working perfectly fine, and I know I loaded the film correctly because my camera doesn't count the frames if I don't (I've made that mistake before so I'm very aware of when I don't load it correctly). I am truly lost and very confused, I really want those photos back because I went on a very sentimental trip with that roll and the photos are very meaningful to me as I'm sure you guys can understand, so if you have any ideas I would love to hear them.