HELP, I GOT PROBLEMS TALKING TO OTHERS

Hey, as you can read: I'm too socially awkward to communicate with others;

I have become more confident and social in the last few months.

But still, whenever I talk to people, no matter how close I am to them,

I'm starting to forget what I wanted to say.

And I really knew what I wanted to say beforehand, I really knew that.

Why am I like this? I swear I can think of some pretty helpful comments

But as soon as I open my mouth I say the most cringe shit ever, start repeating myself or just sound like "um... uh... uh... and then I wanted to... uh...".

I know I could do better but I can't, my mouth seems to be a million times faster than my brain.

I'm honestly starting to get so sick of it,

that I wouldn't even like to listen to myself, when speaking to others.

When I say, that it's awkward, I don't mean it in a 'haha, that was weird' kind of way, 

but in an almost painfully awkward way at times.

Can anybody relate? Any tips?