I know where you are coming from. I was also abused as a child and never said anything or dealt with it properly at the time. I then later developed anxiety attacks and although it wasn't diagnosed I think I was also depressed, the two often go hand in hand.
I personally got counselling for the anxiety issues which definitely helped me however I didn't break my silence about the abuse and that was the real source of these issues. Because of that, I am now back in counselling to now work through the abuse issues.
I definitely agree that you need to speak to a professional about everything, and deal with it all at once. If I had, I may have been past it all by now and not starting again.