Pitching me while breastfeeding.

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My LO is a bit over 6 months old and breastfeeding is going great right now! But when she breastfeeds she likes to hold my boobs, which I dont mind. But she started pitching, scratching, and pulling them. She hasn't realized her strength can hurt me, and doesnt understand no/ it hurts. I've gotten bruises, scratches and have blead from her doing it. I dont know what to do. I've tried mittens but she doesnt want to eat and just plays with them. Holding her hands and swaddling just makes her frustrated. I have to constantly trim her nails. I've tried different feeding positions but she still finds her ways. I cant wait a few months just to see my pediatrician for help. Any suggestions or has experienced problems like this?