Might be a stupid question but are you organised?
My memory is shocking and sometimes I find it difficult to follow conversations or stay focussed particularly if I dont quite understand what they are talking about.
When a meeting is coming up I look at the agenda or think about what it is. If I dont know, Ill ask someone before the meeting. I will take notes during that discussion.
I will review the previous minutes/notes to remind myself.
Using those I'll write some notes/promts/questions to take into the meeting.
During the meeting I write more notes, questions and actions eg if someone mentions a report, Ill write an action for myself to look it up or if someone says sonething I dont understand I'll make a note to ask them. I'll also write any thoughts even if I dont plan to raise them in the neeting. If I do raise something or have a question, I will apways write down the answer.
After the meeting, Ill tidy up my notes/actions ASAP. If I dont do it within 24hrs I wont have a clue what they mean.
As I think of things outside the meeting, I'll add them to my notes.
Before the next meeting, Ill review my notes and actions as well as any formal minutes etc. This will remind me of the key points and also help me to identify if things have changed since the last meeting.
I can't keep things in my head so I have lots of notebooks that I try to keep organised. So when something comes up and I cant remember it, I can look it up.
The more you do this, the more key things "stick". Or you at least know where to find them so you dont have to keep asking the same questions.
Obviously, you'll need to adapt it slightly depending on the meeting. A daily team meeting doesnt always need the same depth as a monthly shareholder one.
If I'm struggling to focus in a meeting, I write notes. I might not always understand what they are saying but it makes me pay attention and not day dream.
What do you need to help you feel more in control?