Hi Mariegil!
You need to see a dermatologist to determine the cause of your hair loss. There are many different types of hair loss. You need a diagnosis in order to determine appropriate treatment options. Unless you know your hair loss is caused by low estrogen, the HRT may not help. For example, if you've recently had covid or experienced another stressful event, you may be experiencing telogen effluvium and your hair will grow back in time without any treatment. Taz's hair loss was caused by a vitamin D deficiency. More estrogen would not have improved her hair growth. She needed to increase her vitamin D level.
I'm postmenopausal and was already on MHT (Estradot 50 + Prometrium) when I experienced sudden hair loss and other symptoms. My meno doc suspected low estrogen and blood tests confirmed I wasn't absorbing the patch. He switched me to oral estrogen to get my levels up. At the same time, my GP referred me to a dermatologist but the pandemic was in full swing and I would have to wait 6 months for an appt. She recommended that I start using minoxidil 5% foam (Rogaine) right away. It was excellent advice. By the time I saw the dermatologist and rec'd a diagnosis of female pattern hair loss (aka androgenetic alopecia), it was clear that I needed more than minoxidil. I was able to start an anti-androgen right away. As with my MHT, it's been a process of trial and error. My current regimen is minoxidil foam 5% and 2.5 mg finasteride, a DHT blocker. That combination is working well for me. My hair looks normal now. Most of my density has returned.
At the height of my hair loss, I could not leave the house without some sort of head covering. My hair loss is male pattern, central front hairline and temples. It's very obvious as I have dark hair and light skin. Because my front hairline was not preserved, products like Toppik hair fibres did not work for me. They work well for other hair loss patterns.
My type of hair loss is very common. By age 50, about 35% of women have this form of hair loss. It's hallmark is miniaturization of the hair follicles. All that was required for my diagnosis was an examination of my follicles using a determatoscope, as well as additional blood tests to rule out other factors.
Hair loss can be multifactorial and you need to address all the underlying issues. Some types of hair loss require a biopsy before a diagnosis can be made. Some types are scarring and lead to permanent hair loss, so you want to start treatment ASAP.
Different types of hair loss:
https://donovanmedical.com/types-of-hair-loss#I know how distressing hair loss can be. I hope you're able to find an effective treatment.