Get her to go to the GP defintely, she very likely has PCOS.
PCOS diagnostic criteria is three things - you need to have 2 out of 3 for a diagnosis. Which are 1. persistent irregular, short, and missed periods. Then for PCOS you also need 2. on a transvaginal ultrasound to see lots of small follicles near the ovaries and/or 3. certain hormones at a higher level than normal.
Also get them to do a whole set of bloods, and also some other hormones, to see whether she qualifies for that part of the criteria.
Blood test wise I'd probably ask for:
• Total testosterone
• Sex Hormone Binding Globulin
• Free Androgen index
• Fasting glucose + insulin
• Lipid panel (cholesterol, triglycerides)
• Vitamin D
• Thyroid panel (TSH, free T4)
• Hirtuism blood panel as well. I'd also use vitamin B6 and D supplements as they can be helpful with energy, also for periods.
Then you do need to start some form of contraception because you need uterine protections especially as with PCOS it can be a 2-5 x higher risk of uterine cancer, so it is so important to protect from that.
This video explains it in quite a lot of detail but very understandable as well, definitely have a watch https://www.instagram.com/reel/DPRWvOkEeGJ/?igsh=dDJlMjc4dGxmbHh5
The pill/mirena coil is there to treat the symptoms,* it treats PCOS, if anything it is the best for the PCOS. It is a treatment for acne, it treates heavy periods, missed periods, irregular periods, it treats hirsutism, it treats the risk of uterine cancer. Saying that it 'masks' PCOS is like saying 1. PCOS symptoms are normal, which they are not, and like insulin masks diabetes. I would recommend either Yasmin or the mirena coil, it will also thin her uteurs lining with progesterone, so then there's not a lot to bleed so she'll have lighter periods and some people's periods stop all together. *This is okay, as it is due to the progesterone working, the lining is thin and so the risk of hyperplasia is not the same as missing or not having a period naturally.
Other meds are things like metaformin or orlistat for insulin resistance, managing risks of potential high BP, etc. Also meds for excessive hair growth or hair thinning.
PCOS is not simply 'hormonal imbalance' - that is not a medical term, your hormones in non-PCOS patients and PCOS patients are meant to be imbalanced. They fall and rise in response to changes in the body e.g insulin being released when you eat or FSH being released when you have your period to stimulate a follicile to grow, or T3+T4 being released when your body temp drops to increase heat production and metabolism.
PCOS is medically defined as hormonal deregulation - a different thing, so it is not using the hormones it has (which are in the right amounts) properly. So insulin resistance is common in PCOS because your body procedures insulin but doesn't respond to it correctly, the same for androgens etc. PCOS is more about bio-chemistry and genetics which you cannot fix, lifestyle changes, hormonal meds etc can help to managae it and get your body to regulate and respond and flucatate hormones properly. You need to fight bio-chemistry with bio-chemistry; meds.
https://vm.tiktok.com/ZNdcGc57y/
https://vm.tiktok.com/ZNdcGbNr7/
Depending on your issues, you could ask your GP to refer her to see an an endocrinologist, gynecology and a dietitian as well. But you should also ask for the bloods I mentioned earlier because then they can whether she has PCOS, whether her risk of diabetes is increasing, if she has worsened insulin resistance (which she likely does as you can have that whilst being slim, and explains her struggle to lose weight), how her androgens are being managed etc - from there she can get referrals for secondary care to endocrinology.