Pics are your best freind here mate, get some pics up then people can help diagnose the problem, but it sounds like what happend to me, so im gunna say nitrogen defficentcy, because the 2 week stretch takes alot of nitrogen
Its not abnormal for lower leafs to begin yellowing and falling off during flowering. Its just your plant saving energy and nutes for making big beautiful buds! If its only a couple leafs I wouldn't be concerned
ok thanks ill try and get some pics up here soon. What would i need to do if it is in fact nitrogen deficiency? if you cant tell im a rookie at this lol