Plateau frustration!!

Evellitha

Finished 1 round of insanity 2 weeks ago. Now redoing month 1 until i go out on vacation in about 3 weeks (Will be gone on a road trip for about 3 weeks but keep active with hikes and runs). After coming back was thinking of doing a full round 2. But i'm honestly scared that I hit a plateau, i want to lose more but my last stretch (last 10lbs and tummy fat just wont budge) any idea how to do more? Should i change it up? Or am i as far as i can go?