I know I shouldn't be on this board anymore apologies... but @whatsthecraic91 I saw your post re: high prolactin. I had the exact same thing, so wanted to share my story as may be helpful.
I had tests in spring/summer and my prolactin was CRAZY high (1,600). The docs were surprised I was still having regular periods. Though my hormonal acne was also really bad.
I had an ultrasound scan to show I had no signs of PCOS (whereas a scan a few months before and after showed I did - so I dunno about that!) I also had an MRI to see if I had a cyst on my pituitary gland. Totally benign and quite common! The wait for this was nearly 6-months, by which time my prolactin dropped to within normal range.
It can be due to stress - and I had a bereavement in early summer which may have triggered it. But even if you do have a cyst or ongoing high levels of prolactin, there are two drugs which are very effective (bromocriptine and cabergoline). I saw a study that showed in women TTC with high rates prolactin, something like 85% were pregnant within 6-months of starting the drug. So please do not worry... in a way, it can be reassuring they have found something they can fix, rather than infertility remaining 'unexplained'.
I also don't want to recommend a herbal supplement, especially as I didn't get on with it - so please do your own research. But vitex is believed to lower rates of prolactin. Do tell your doc if you start taking this however, as it can interfere with your blood test results.
Some 6 or 7 months after I was given this diagnosis - I am pregnant. So don't give up hope!