Need advice

Hello that's my first post I need advice

I’m a 48-year-old female with hypothyroidism on 150 µg of levothyroxine and i think I have iron deficiency palpitations. I started having weird palpitations after I forgot to take my medication for 2 weeks due to work stress. When I resumed the full dose, I began experiencing very annoying palpitations, especially at rest or when I go to sleep. I never had these palpitations before.. I had multiple heavy periods also I went to my thyroid doctor and he decreased the dose to 100 my lab is

Potassium: 4.1 Magnesium: 1.97 Ferritin: 14 Hemoglobin: 12.7 Mch:26.6 Mcv:81

Has anyone experienced the same issue? I used to drink a daily cup of coffee, but now it greatly increases my palpitations. I’ve also noticed that chocolate triggers very bad palpitations.

Any advice please 🙏