You sound like me. Went through a faze of bowling inswingers then outswingers then inswingers. Now i quite comfortably are able to control the ball both ways with the outswinger being my preferred choice of ball.
Just practice in the nets, getting a consistant line and adjust all the time to get the perfect area. But remember not to bowl the inswinger every single ball, batsman will find it predictable and your wickets tally will fall. You mentioned you bowled outswingers for 6 months, how about chucking one of them in or a cross seamed straight ball.