Hi, It most certainly is due to the infusion a week after.
The side effects of IV iron are usually minimal, but may include the following:
bloating or swelling of the face, arms, hands, lower legs, or feet
dizziness, faintness, or
lightheadedness when getting up suddenly from a lying or sitting position
gastrointestinal pains, including nausea and cramps
problems with breathing
skin problems, including rash
chest pain
low blood pressure
anaphylaxis (a severe reaction that can include
difficulty breathing, itching, or a rash over the entire body)
In all probabilty this is a reaction to the iron so i suggest you go the ER as soon as you can and get a cortisone and
epinephrine injection.
If you have neck/mouth swelling,dizziness,difficulty breathing or chest pain contact an ambulance immediately