Hi, Stefanie;
I've never experienced it, but, it's not a long stretch to imagine.
You've been seriously hurt and imobile. You're depending upon others to meet your needs. And you're in cronic pain. Those are perfect conditions for short term situational depression to begin.
Have you called your doctor? Please do so. You may need a short term support system in the form of counselors, meds or a combination of that. Only your doctor can diagnose you, so please give him/her a call.
Then let us know how you're doing.
Prayers for your well being...
Shalom!