Hi eloise999,
I also have ET and I am triple negative. I take hydrea since age 60 and aspirin since diagnosis. I have had this since 2002, that would be 23 years now.
Here is a website I fine very helpful. It takes several readings to start to comprehend.
I am doing well. I hope you are doing well too. Hope you have a good hematologist/oncologist.
Let me know if you want me to share more about living with ET (triple negative).
https://www.nccn.org/patients/guidelines/content/PDF/mpn-patient.pdf