Hi Kat......welcome to NT. I hear you about the cognitive issues. Some days I feel like I appear to be "dumb" and I know I'm not. The simplest things become monumental. The more irritated with myself I get the worse the sx become.
You're not alone and I agree with your idea about complaining. I always feel guilty after I've griped about my situation because I feel there are so many worse off than me.....and what right do I have to groan about myself when others have much more reasons to do so. But, we all have our "breaking point" and as long as we don't wallow in it a few pity parties can be good for the soul, IMHO.
Hang in there......there's good and bad days for everyone.