Those three days -how to manage?

Yes i am asking the question about the 3-4 forbidden days every woman has to undergo.Mine is a special case-I get so tired ,i just sleep off,Done all tests/scan etc..nothing wrong medically.But i alwyas find that when those dreadful days come my work shoots up like mad in office-& as a result-too tired-shouting-stress.
Any suggestions what other ladies do so ican follow them.Thanks