post-iron infusion issues.. late period?

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Hi. I had an iron infusion for the first time a week ago (I am a Female, early 20s).
It was 1000mg of Monofer.

I felt okay on the day (Monday) of the infusion and the following 2 days after (Tue, Wed) - my only issue was struggling to fall asleep and waking up.

Then came day 4, 5 and 6. Slight fever (38.5 celsius / 101.3 fahrenheit) + chills + night sweat (particularly on the chest and is causing acne there) + sore wrists, fingers.

I was supposed to get my period on the Friday (day 5), but it's late by 2 days. I know I shouldn't overthink but I'm convinced the infusion has caused this as all my usual symptoms and patterns prior to my period beginning had happened, but it has yet to start.

One doctor says it's odd that my symptoms happened a couple days after rather than within the first 3 days.

A different nurse says my symptoms are normal and could last up to a week. And that if it gets any worse to let them know.

So I'm just here, not exactly feeling my best but not in a complete emergency either. My biggest concern is the late period and night sweats. I'm worried that my whole hormonal clock has been messed up. I hope the iron boost doesnt cause insomnia either (????)

I would appreciate any insight and experiences everyone has to share. Thank you.

Posted May 24, 2026, 2:50 AM UTC

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