Will i screw up my teeth?

You are going through an expensive treatment and should follow the rules accordingly. If you find you can't, talk to your orthodontist. Perhaps if he explained what is exactly going on when wearing the elastics, you will understand the goal of each application. He may come up with an alternative for you. Wearing both systems at the same time is probably fruitless and you will not get the anticipated results. This will only prolong your time wearing them, and we know you don't want that.