I think you have a great chance! If you really want it, go for it! I agree with snoves, apply to schools that look at applicants holistically. Continue volunteering and shadowing, try getting a part time job like an ABA therapist or instructional aide. Start working on your SOP early, get letters of rec from professors/supervisors who know you well, and study hard for the GRE!!
I have a really low overall GPA (under 3.0) and an OK last 60 units (3.5). I took the GRE twice, both scores were barely average. However, I have unique volunteer experiences and worked as an ABA therapist for over a year. I was confident that the people writing my letters of recommendation wrote me amazing letters because of the relationships I created with them. I applied to 10 schools and so far interviewed for 3! I know they’re no acceptances, but the fact that they are considering me is a huge accomplishment for me! I was very close to not applying this cycle because I was so discouraged by my stats, but it is my dream to be a SLP so I decided to go for it. If this is what you want then work hard on your applications and show schools your passion!