I have one too and I love the power. Mine is old now, but I have a lever for the heat, and a wheel for the power so for me I just turn down the wheel to lower the power which I had to for a friend who was staying. Or I'm just thinking too - your shower head should have a "wheel" too which gives you strong or softer pressure. Have a look at the shower head you have.
well the last shower head I bought - you can turn it and get whatever pressure you like. Bought it Home Bargains and it is easy to put on - just screw the old one off and same with shower head.