This happened to me last winter - it's usual to 'moult' a bit more at this time of year but not excessively so and I was worried! I got a B6 supplement and some special shampoo from my hairdresser. Within a few weeks it was fine and this winter I had no further problems. I'm sorry, the brand of shampoo was a French one so not much use to you. It was expensive (around 15 USD the bottle) but you only needed a tiny bit (and I have long hair) and one bottle was all I used. I'm sure your hairdresser could advise you of an equivalent.