Sorry to hear your problems. The fact that you are slicing and shanking it would suggest that the club is coming into the ball from outside the line to inside, which may mean you are coming over the top. A video may give people an idea whats going wrong (without everyone getting too technical).

Just remember that the swing is best kept simple, just two turns of the body where the ball just happens to get in the way. As you said a visit to the pro may be your best bet?