Physically can’t say certain words it comes and goes.

Physically can’t say certain words it comes and goes. Hi, I am just reaching out to see if any one has any similar experiences to me. I would not say that I have a stutter as in stuttering my words. My problem is that I literally go to say the word and I can’t even get the first letter out my mouth to say it, but then I can replace it with other words after thinking of them and stumbling around words for about 5 seconds. (Which feel like the longest 5 seconds of my life every time) It comes and goes and I think it has to do with anxiety and stimulants and also alcohol. This probably started around 4 years ago for me, I am now 34 year old. I started drinking coffee when I was 28 and had no problems at all for the first two years. From 30 it was only coffee or very high stimulants like cocaine (only being honest) that would do this. I could cope with this because I could either decrease my coffee intake or just keep away from drugs which was fine for me. I still drink coffee (no more than two shots a day) But recently it has also been as little as having 1 pint of beer or 1 glass of wine that has set me off not being able to talk and as far as I know alcohol is not a stimulant. I don’t know what’s going on and feel like my speech is deteriorating by the week. Let me know if any one has any similar experiences please. Thanks.