i have pcos and have tried clomide before, of which i did not ovulate on it. i have been on letrozole for the last 4months and have just gone to 5mg day 2-6. i have taken letrozole to concieve. On day 14 i had a scan that showed two follicles size16 and 11. could not have a followup scan so had progestrone level checked on D28.(irregular periods) and it was 34. For the last from day 30 (two days ago) i have been having twinges of pain as if i am having a period and my breasts are a bit tender. does that mean it might be implantation pain as my fertility nurse told me to expect a period around the 10th? I am scared of doing a test as i have been disappointed so many times and it might just be PMS but i have never had twinges with PMS before