Can anyone recommend a great workout for toning and slimming the whole body fast?

I lost weight to become a size 10 but wanted to slim down to a size 8 and tone my body. I started doing the Tracy Anderson method in march as I thought this would work but instead it has bulked me up to a a size 12-14 again and I can no longer fit into my clothes. I am going to Italy at the end of August and wanted to get into great shape before then? Can anyone recommend a great workout that doesn't put too much strain on my body and works fast for slimming and toning? I am 5ft 2 inch and also don't have a lot of space in my house.