breast pain is common in some females while having their period. as for being tired all the time you could be slightly anemic (meaning your iron is low) and you should take a good multi vitamin every day. when taking a vitamin with iron which sounds like you need always take it with meals. taking a vitamin with iron can make you experience nausea and vomiting. always take vitamins after a meal.
i had my period 2 weeks ago and my boobs ache which they never ever do and im tired all the time preg test is neg. could i be pregnant only 2 weeks after a period and already have the symptoms but its to early to detect it by a test and thats been my only period in a yr due to birth control and it only lastedone day