I need some advice.

I need some advice. So i have been stuttering ever since i could remember, it has impacted my life heavily but still i didnt mind it that much but now as an new adult about to turn 19 i have to deal with stuff like looking for jobs and stuff that requires alot of speaking. I some how speak properly infront of 1 or 2 people but these day i am having hard time speaking to someone on phone like the first phrase hello is not coming out of my mouth. So can any one give me some advice to tackle this situation because i have an interview for my student visa on a call in January and my anxiety is starting to kick and i am constantly being paranoid . I feels really pressured and feels like i am out of breath just from seeing my phone ring