My mom claimed me as a dependent

My mom claimed me as a dependent because I was still in High-school, I’ve since then gotten a job and received a tax return for that job. When I tried to E-File it won’t allow me to so I mailed my tax return in and have not received or heard back. After FINALLY getting ahold of someone they told me that my mom needed to amend her tax return and unclaim me for me, if she does this will I be able to get my return? I’ve been waiting on the money and now I’m hearing I might not even get my return at all. Please help a new adult out :(