For the past 13 days I have been using either Clonazepam or Lorezapam, sometimes mixing the two. The doses have been usually around 2-5mg of either substance. Will I experience severe withdrawal symptoms other than some rebound anxiety?
Maybe slightly. It doesn't seem like you have been using long enough. I have went through benzo withdrawals and I can say they are worse than any other type I've experienced. 3 months of xanax was worse than 3 years of heroin withdrawal wise. And be careful and tell someone if you withdrawal. I have seen someone I cared about have a seizure from withdrawals right in front of me. It's no joke. You can think you are fine but a minute later you'll be on your way to the ER.
It's impossible to say, since you'll have nothing to smooth it over with, you might be more likely to notice every little thing. But hopefully, you'll get lucky and won't have any issues. Best of Wishes!