Pressure in head and lightheaded— Anemia after delivery

Has anyone here been on iron pills during pregnancy, been told to stop 4 weeks PP, and then ended up still needing to take their iron pills? I was on iron supplement pills for the 2nd half of my pregnancy, and then my midwife said I should stop taking them 4 weeks PP. She did not do follow up bloodwork. I’m now 7.5 weeks PP and for the past week I’ve had what feels like a sinus headache in terms of pressure and location, and a pretty consistent feeling of dizziness. My blood pressure is normal so it’s not that. I have an appointment with my GP tomorrow but I’m just curious if any other moms ended up needing to go back on their iron supplements?