Pumping posture

Does anyone have tips for pumping posture? I pump 5-7 times a day for 15min and I'm killing my back. It's almost to the point where I'm crying because of pain! I sit back on my couch and have to lean way over and hunch for the milk to flow into the bottle. I've tried one of the hands free pump bras but since I pump about 4 oz each time the bottle gets to heavy for the bra and the weight of the bottle tugging on my nipple gets painful. It's a lose lose for me right now and I'm desperate to fix it!