let me tell you something. i got DEE for my a levels. it knocked my confidence so bad i didn't even want to risk going to uni.
enrolled onto a ba law course at my university college as the main uni couldn't accept my grades.
the following yr i used my first yr grade to enrol at the main uni (they finally let me on to do the llb course)
i changed course through clearing to do advertising instead - 3yrs later i graduated w a 1st and i'm currently in a decent paying job relating to my degree.
u can do it. if you have to work 2 or 10x harder than the average student, you will do it.