Going by the fact that you didn't feel depressed before this physical condition then (to me, and i must point out i'm not a consultant psychiatrist, just a psych nurse so please dont take this as me diagnosing you... just sharing my gut feeling based on very limited information given over a forum) it feels like the current depression is reactionary to the situation you're stuck in at the moment. if it were me in that situation i'd hold back on the tablets to begin with and look for anyway you can to get some gentle exercise going on if you can, and to maximise any opportunities to do anything you enjoy to naturally boost your mood and chemicals in the brain that help improve your mood.
i'm currently off the bike and cannot do all the exercises i need to for ongoing back problems/pain, due to a fractured shoulder and my mood has dropped noticeably... i'm stressed out by even the small things and found myself withdrawing socially. like you i wouldn't say i'd suffered from depression before hand but even a few weeks of not being able to exercise/increased back pain has made me realise how much my previous level of exercise and time spent doing things i enjoy helped keep my mood on a good level.
anti-depressants are useful drugs when used correctly and for the right reasons. they're incredibly effective for so many people, however as others have mentioned there are side-effects, especially during the first 2-6ish weeks (Depending on the drug). the main side-effect that i think would impact you the most especially whilst suffering from your current physical situation would be the 'blunted affect'.. basically a numb kinda feeling, no real low moods, but no real highs either, so that natural high you might get from exercising or your other hobbies could very well end up not having the same impact. this doesnt happen to everyone on anti-depressants but is pretty common so something i'd consider when weighing up your decision.
if it were me i'd try and hold off the tablets for now and do what you can to stretch as much enjoyment out of what you can do, there's lots of advice about on the internet about ways to combat depression... a change of diet can help, even writing a list of things in your life that are reasons not to be depressed and putting it somewhere that you'll read a few times a day could make a small difference that makes the day a little easier. this doesn't stop you from taking them if you feel you need them after a while but all the little steps should make a difference and a boost to any tablets you may decide to take.
i hope things work out for you dude, my email should be on my profile if you need to vent, ask questions or even just tell me to mind my own business and stop posting lolcats.
(not used to psoting serious stuff on here, excuse the following)
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