Have just had my 4th BFN of TTC no.3. When ttc before, I read the books but this time have naiively gone for the 'let's not think about it too much or do anything special' approach but alas the relaxed approach hasn't worked yet. What are the basic things I should be doing, i.e. drinking lots of water and my big question is 'should I give up coffee?' because I really don't want to. DH tells me I should . I also have PCOS and was on metformin when dd2 was conceived.