Hello,
Sorry you've been up and down but well done for making the Drs appt. I don't know whether this was just me being odd or not 
but although I was ovulating when I did all my ttc tests, my progesterone levels were low so, before we realised we needed ivf because of DH's overly chilled out swimmers, my Dr was going to give me progesterone supplements to help sustain a pregnancy beyond the first few weeks. Another reason why they should help at least work out whether you have PCOS or not.
I don't mind you asking about my dull diet at all! Although it will bore you to tears. Basically, I stuck to a low GI diet - so no sugary things 
, no booze except the odd glass of red wine , no white bread, pasta or rice, lots of pulses, nuts, fruit, veg, quinoa and wholegrain stuff.
I also ate 5 to 6 times a day rather than 3 times a day to stop my insulin levels going bonkers. It's actually not that hard as two of my 'meals' were snacks of fruit or nuts with yoghurt so that was quite nice!
It was a bit of a pain to begin with but I ended up feeling so much better and I could tell it suited my body as my cycles went from anywhere between 37 to 60 days to a much more normal 30 days.
There are lots of websites that tell you about GI diets; most of them say things like you can have one high GI and two or three medium GI things a day ... tbh I wasn't that exact about it, I just ate a lot of the low GI stuff and dipped into medium and high when I felt like it.
My Dr also advised me to do lots of exercise !!!! She said because PCOS is often linked to irregularities in insulin levels, short, regular bursts of high intensity exercise is better than going for two or three long gym sessions a week. So my dog and I were out sprinting around our local park every morning! We just did 15 minutes but went pretty fast. I have to say it did work though ... I lost two stone in three months and felt much better.
It was quite hard work but I did have some excess weight to shift; it sounds like you need some help from the Drs in terms of determining whether you have PCOS or not and then, if you have, just a bit of tweaking to help balance out the old hormones. If your cycles are regular though, then that's a great start ... given you had a diagnosis before though, do push for tests even if your GP isn't keen. As I understand it, some people with PCOS have regular periods but don't always ovulate regularly and, as I said, I was ovulating regularly but my progesterone levels were very low (I had a very short luteal phase) so, even if i had fallen pg naturally, the chances are it wouldn't have stuck without some help.
Do let me know how the appt goes,
xxx