We saw a fertility specialist with no.2 and the first step was regular blood tests to work out my cycle. The dr phoned on a Sunday and told me I was ovulating and to DTD. First month of seeing him. We got pregnant straight away (after 8 months of trying on our own). We didn't have to progress to chlomid. I know this doesn't answer your question, but maybe it is better to spend the money on a specialist...?