Can’t say hello or hey when answering the phone

Can’t say hello or hey when answering the phone A couple weeks ago I randomly started having some trouble greeting while on the phone. It’s almost like my throat tighten & I can’t get anything out. I work remotely so I don’t want this causing any problems during those calls. I do have OCD and sometimes repeat words over & over to myself at times, but I’ve never had any problems with an actual stutter until maybe 1-2 months ago. Is there any way to get rid of this without a form of therapy? Does something like this usually go away on its own? Thanks.