Do i have dyslexia? or is this normal?

When i read i tend to skip words (actually i involuntarily try to guess the next words, most of time i do guess it right tho), this happens a lot when i'm reading something in my first language, Spanish, even though i can read really fast and at the same time understand what im reading. Also when i do math problems i don't know why i write the wrong answer, For example instead of writing a 5 i end up writing another number without realizing my mistake. Once a teacher asked my parents if i was dyslexic. I had a mild problem concentrating when i was younger. Most people around me think i am smart.