What to do to slow down hair loss?

Good morning, what can I do to stop hair loss? They fly handfuls.. the ponytail is already half as thin as it was in April. I'm heartbroken. it started when the Orlifique contraceptive pills stopped serving me. then they were changed to Microgynon 21 and I hoped that since the other symptoms stopped, that the hair would stop flying. I did a blood count, tsh3, iron also - the results are normal, I also use rubs, but nothing helps, please help