Did you ever have doubts about becoming an engineer?

Personally, Yes I have had doubt while studying in school simply because engineering takes lots of time away from life while in college.  BUT I asked myself what caused the doubt? The doubt stemmed from feeling like I wasn't smart enough and that My B+ grades weren't good enough. After I realized why I was having doubt I made sure to study harder and be confident in my abilities and continue down a STEM path. There is nothing wrong with questioning decisions just make sure to always challenge yourself and be honest about what it is you truly want to do with your career.

Hope this helps! You are sooo young so attend as many science camps as you can to make sure its something you really enjoy and want to do!  Be safe and take care