Hi Rebecca, it's a really bummer when that happens and I know how fed up you must be feeling but first things first, I don't think you are being careful enough or following enough of a strict low fat regime so I think you need to re-think what you are doing and start again. And don't worry, if you work really hard the next 2 weeks you should be able to drop enough lbs for your doctor to keep you on the tablets and if not, just explain that the first 3 weeks you didn't really know what you were doing and so got some help from people already established on these tablets.
So, the rules are:
1) stick to 1200 calories per day. Not sure how much you have to lose but I had 5 stone to lose so started on 1400 calories per day but as I have now lost 20lbs I am down to 1200 per day.
2) no more than 45g of fat per day but this MUST be broken down into 3 meals, therefore 15g of fat per meal maximum. Within that 15g per meal, no one item should have more than 5g of fat per 100g. For example, if you want a tin of soup which has 2g of fat per 100g and you want the whole tin, and the whole tin is 400g, you would multiply 2g by 400g (2x4=8) which would work out as 8g of fat for the whole tin - which is fine by the way.
3) the only in-between food items you can eat are fresh fruit and veg, and zero fat foods such as muller light yogurt, zero fat yogurts, sugar free jelly, rice cakes etc. But be careful with the yogurts as you can't just eat loads of them as they all have calories and you have to count calories.
The reason you have had terrible toilet moments is because you are eating too much fat. You basically have to eat a very very low fat diet and follow the rules above if you want to succeed. These tablets don't do the work for you, as many of us have found out, they merely "persuade" you to eat zero fat because of the horrendous toilet moments if you do. You are the one who still has to put all the effort in.
Exercise is great, it really does help and you should definitely try to keep this up.
Many of us, me included, found the first 5 or 6 weeks difficult because you really have to get your head into gear and figure out all the things you can and cannot eat but if you try to follow these rules above - which believe me, become 2nd nature after a month or so, then you will start to see the weight come off. Take your inches too as I have gone through times where I don't seem to lose weight but I have shrunk none the less.
Good luck and let me know if you have any other questions.