It sounds like you know that you should speak to a mental health professional. But I don't know that that's going to assist you with your recent onset stuttering. Developing a stutter at your age and after your covid experience is very concerning. You might want to seek out a neurologist. I would not wait on this one. Do some lookups I'd options in your area tonight and start making phone calls first thing in the morning to schedule an appointment. I would also suggest consulting your primary care physician. They may be able to give you a referral to a neurologist.