How long does chemo brain last for.i finished the rounds 16 weeks ago and in that time I’ve had a mastectomy with reconstruction and full right side lymph node removal which went well.and I will be having radiotherapy soon 15 factions and have just started Kadcyla infusions.im on number 1 of 14.which I will have till December then will go on something for hormones.but the brain fog is still here it effects my day to day life.i carnt even drive anymore.my sister is taking my 5 year old to school.has anyone got any tips on what helped with it and how long it lasted for.and if you had brain fog with Kadcyla .im feeling really low at the moment and such a failure as a mother.