All Pictures, Albums and Presets are gone - how can I get them back?

Hello everyone, 

I've been using Lightroom for the past 3-4 Years. The last years I used the offer of my school to get the Adobe License much cheaper. Since I graduated and being not longer a student of the school, I know had to buy the subscription for the regular price. Over the last years I stored a few hundred pictures in the Lightroom Cloud, so I could use everything on my MacBook and iPhone at the same time. From Albums of my holidays over all the presets I collected over the time - everything is gone now. 
I don't know exactly when my school-subscription ended but today when I opened Lightroom I got the message, that after an expired subscription the Cloud-Data only gets stored for 71?!? days? I mean, it would have been REALLY helpful if I knew that earlier. Is there any possible way to get my data back?

Thanks for your help guys 🙂