Have you had your pre op assessment thing yet when they take your bloods? If not this is when they check your bloods and iron levels. I was anaemic a little while ago and after taking iron supplements I am ok now and my blood tests were fine. I just had my nose done on Monday 🙂 don’t worry about it I am sure you will be fine if you are taking your supplements. Try to eat lots of dark green veg like broccoli and eat red meat!