Did anyone feel worse after an iron infusion?

Nat

I had mine two days ago and don’t feel myself.

Incredibly lethargic, not just mentally but physically, like I have noodles for limbs.

Struggling even more to get comfortable and have general stomach discomfort.

I thought maybe I was dehydrated so been drinking more water but I feel worse. Is my body gearing up for labour or is this normal for the first couple days?

Or should it be a cause for concern and I call the midwife? 37+1 today.