I am in despair with my bra! I was wearing the wrong size for a long time (36F) and went to M&S 3 wks ago- she put me at 40E, although some I tried felt too loose. I ended up with a 3 pack T-shirt style (which I wanted- plain and simple style) in 40E. Knew I would have to adjust to wearing something larger than I had been, but having worn them for 3 wks I am sure they are too big. The front gaps away from the body (in the centre) it’s on the tightest fitting but I can literally fit my hand between my back and the bra, and I can fit my whole fist in the top of the cup. I’m not sure what to do size wise now- should I go up and size or down a size or change the cup size? I’m tempted to try a different store of M&S but part of me doesn’t want to go back there- unfortunately I don’t have loads of money either but want something that’s right- what should I do?