Yes you can get yourself out of depressions, and anti-depressants can be a powerful tool for helping with that. For me, anti-depressants help me get out of the "oh god it's all hopeless" part of depression, so I can deal with the rest of it myself.

Also, you've had some incredibly huge life upheavals recently. Death of a parent and moving are two of the biggest stressors out there. You're not weak for having htem hit you hard.