Im starting to wonder if I'm dyslexic

Numbers.
I can't stand them! I'm eighteen and wonder why i haven't been diagnosed with it. The subject never come up. The only thing ever said to me is I need extra help in math.
I can't even count up to ten without taking my time. Saying it aloud is easier but I can't count aloud all my life! lol. I was playing a game with a friend the other days and had to move six places.... I couldn't count it. I kept skipping spaces or numbers. Usually, I don't count I'll see something like two pairs of three and see it as six(does that make sense? For example (LLLLLL) I wouldn't count the Ls I would see pairs and go from there. I failed Alg three times. The fourth time I was one on one with a teacher and we didn't even get nearly as far as I was supposed to.
When I write a sequence of numbers like '1 2 3 4 5 6 7 8 9 10' one and two I can read fine....and 9 and 10 fine...But the middle numbers look jumbled and hard to place.

Could I possibly have dyslexia? please keep in mind, I don't know much about dyslexia other than words and numbers look a mess...