Am I over reacting or is the other person?

My friend has currently been banned from Snapchat , for personal reasons, and asked me to keep her streaks. Well apparently I ‘lost’ all her streaks (last time I checked I only lost 3-5) and (I apparently) lied about sending them. I have sent hers more often than my own !! Says I’m a bad friend and how I’m always pissing her of. This has just ruined a really great day for me, it’s made me feel hopeless and is slowly killing me. She has got mental health problems but I have them too. Am I being unreasonable or is she overreacting (or are we both?). Thanks in advance x