Hello, I Am 51 And Have Had Intermenstrual Bleeding For

Hello, I am 51 and have had intermenstrual bleeding for a few months - due to have a hysteriscopy in a few weeks - 3 weeks ago hg was at 9.4 and ferritin at 5 so was put on iron tablets, yesterday hg at 10.9, I still feel pretty fatigued and really struggled barely playing tennis with my daughter today, should I not feel fine again if my hug is 10.9 already?