Hello Friend, Good that you are seeking a help here. All these symptoms are sign of anxiety in your mind . When you mind is pre occupied with certain thoughts or overthinking about  some worry or fear about future, obviously you are not in present and will lack concentration and memory. Be positive. It's an addressable issue. You need Adopt few self behavioral therapies, excersise, lifestyle routines along with counseling to overcome this problem.

Mild cognitive impairment causes include anything from depression to vitamin deficiencies to alcohol abuse, and even some causes you probably never considered, such as hearing loss or an underactive thyroid.it’s actually quite common for mild cognitive impairment to result from something other than dementia. If that’s the case, the cause may be treatable, meaning your doctor can diagnose it and address it, and your cognition can potentially return to normal for your age.

It can be due to other reasons as well which needs to be investigated for effective treatment Consult with me or any psychologist for therapy and counseling Connect with me through practo app All the best