It is very common to occasionally experience an extremely light period, and it is usually nothing to worry about. This can be caused by temporary stress, hormonal fluctuations, changes in weight or diet, or even early pregnancy. You should not take any medication to force a heavier flow without a proper medical evaluation, as inappropriate treatments can disrupt your cycle further. I recommend taking a home pregnancy test if you are sexually active. If this light flow persists for more than two consecutive cycles or is accompanied by severe pain, please consult a gynaecologist. They can identify the exact cause and prescribe appropriate treatments if necessary.