Memories should be exercised by recall  techniques. Revision helps memory. Try to change ur method of studying. Identify keywords and not whole paragraph.

Hi suggest you to reach to psychologist, sometimes it could be a co morbid condition too. A therapeutic intervention is important. There's a lot more to know about the issue. Please reach a psychologist.

Kindly share the purpose of your reading.  A lot depends on that.  Also notice your thoughts bwfore and during reading.  Do you tend to forget important information or something insignificant?  What makes you feel that your memory is not good?  There are individual differences in capacities so please do not judge yourself against any standard. Hooe this helps you.