At times,can messing up words, forgetting how to spell, be expected 4 my age? can depression / stress cause this? think have ptsd from pastmarriage..

Yes: At your age it is not uncommon to have some word finding difficulties. the issue is the degree to which this happens. Yes this can be precipitated by depression and/or stress. Seek an evaluation by a mental health specialist or neurologist to determine how serious this problem may be.

See your doctor: While both depression and the medications used to treat it can interfere with some cognitive functioning - something as specific as you mentioned warrants further investigation just to be certain. See you doctor ... Hope that helps!