tips for losing inches?

I have my brother's wedding in 2 weeks, and i ordered my bridesmaid dress which was an 18 yet for some stupid reason they ordered me a 14. I could barely get it done up! :'( thankfully my mums a seamstress and was able to let it out a bit but its still REAL snug, it's uncomfortable to sit down in and if im going to be in this dress for 12 hours, i need to lose some inches. I've lost 10lbs and 4inches in about 3 weeks, but i just keep losing weight and not inches. I'm currently on the 5:2 diet, and I do cardio/strength every single morning for 30-60 minutes, i drink lots of water, yet im losing weight, but the inches seem to be staying there. I just need to lose possibly 2-4" off my waist/stomach region. any advice?! thank you!