Hi Dotty22,
They say it's normal to have bleeding within up to 6 months after starting HRT. I was a bit surprised when I recently started slightly bleeding 10 months into my HRT. My estrogen patch has been increased 5 months ago. I contacted my GP and she did not worry about it and said to contact her if it doesn't stop in 3 months. I am a bit surprised with that response, but maybe it applies to any increase too within first six months.
I think it's always a good idea to speak with your GP, it would be good to do so to put your mind at rest.