Dating

Boyfriend yelled at me and called me a bitch for not picking up his call. Is this a red flag?

I've been dating this guy for only a month and things are moving pretty quickly especially on his end. We spend a lot of time together... Unfortunately I'm struggling with my mental health (anxiety and Depression) which has made it harder to be there for him 24/7. He expects phone calls everyday (one in the morning and one at night), whereas I'm more of a texter. He expects me to have these phone calls with him everyday. Last week my phone died for 2 hours and during that time frame, my boyfriend tried calling me, to which he received no response. This made him upset. After that, he asked me to promise him to never let my phone died again so that he could reach me anytime in case of emergency or anything. I agreed and was staying on top of it, until this morning. I forgot to plug my phone after turning off my alarm to sleep a little longer. My phone had died and he tried to call me because he assumed I was up (since I sent him a good morning text before it died). It was early so I went back to sleep while it charged. Anyway, after waking up, he got really upset to the point he was yelling at me and calling me a cold bitch for not taking his feelings into consideration on this matter. Am I in the wrong or is this a red flag?

Boyfriend yelled at me and called me a bitch for not picking up his call. Is this a red flag?
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