Iron dropping after period?

So this is the worst period I've had in a while and every symptom was heightened more than it usually is. My pms, flow and my anemia but for some reason I just got off today and my iron is so freaking low I went to sleep through 2pm and when I woke up I literally felt like going back to sleep and my body is aching so bad, I haven't felt like this in a while I feel worse than I was when I was on my period, why? :( I've been waiting to get off bc I need to start doing stuff around the house but now I feel so shitty and I can't even get up my balance is off, I ate 3 dates and nothing changed, any advice? I feel useless and slow.