I haven't had those side effects but somewhere on here you'll find @arpie has posted a list of published side effects plus what women on the forum have reported. For me, it's severe joint and muscle pain, stiffness, osteo-arthritis, vaginal and skin dryness, hair thinning, and fatigue. Memory problems could be Letrozole or could be post-chemo! I believe that changing meds does improve things for some and Exemestane in particular as it is a steroidal AI so a bit different but others may be able to provide more accurate information.