Never happened to me. I have a very close relationship with some angels and whenever I decided to contact a demon for something, it was my decision and mine alone. It never had a negative impact on my relationship to angels.
I can also 2nd this. I have wonderful relationships with both angels and demons and have never had to “chose a side” or feel guilty about it. I have had an angel and demon work together with me as well.
What country are you in? In the US where I am you can do guild and nursing care to help. I county hind really anything natural to help with this one.
I would get some clear quartz and amethyst and call on Ariel. When I have sick animals I use the crystals but running then down there back from true tip to the nose down there’s belly back tot he tip of their nose.