Unless the depression or PTSD is getting in the way of your recovery, and I know that may be hard for you to know... I agree with everything said above. Once you get the alcohol out of your life, and you can process your emotions accurately, you may find that the depression and PTSD was either the result of alcohol or was made much worse.
If your not sure, definitely see a counselor, even if it's just once or twice. Explain why you are there... He/she may have some thoughts to help you.
But if your recovery is progressing along, get the recovery thing going, the other problems may take care of themselves.
I like what everyone said... reread Laurie's post... And Taz's... antidepressants are not unusual for those in early sobriety.
Mark