Kazg66
It is quite normal to get some bleeding in the first 6 months of any conti HRT and for many women the conti HRTs can result in ongoing erratic or problematic bleeding. It's basically your body adjusting to the hormones, the womb has built up and is therefore shedding - by 6 months of use, the HRT should have got the balance right, your body has adjusted and this should mean no more bleeding.
You need to check with your doctor about the ‘blood thinners'. I doubt they would be causing the bleed but perhaps have an influence on the bleeding - your gynaecologist should know?
If the bleeding doesn't subside over the next couple of weeks then do pop back to the doctor, as you may need a scan to see what's going on. If bleeding is ongoing, then having a Mirena fitted can be a good option and you then use oestrogen separately as gel or patch. DG x