@AlexiDingDong you got into too many good colleges. 1 could be a fluke (& even then most likely it is not a fluke) but for 4 good institutions to admit you, there can’t be any doubt that you were considered on the basis of your efforts and merit.
Also believe me, each one of your peers has self doubt as well. I am not from this generation but remember thinking to myself that I didn’t deserve to be admitted when I sat with the best and the brightest in the first class at my college. They all seemed like they were in a different league. And… they thought I was a part of the smart guys group and they individually weren’t. Funny but true.