Let me talk to you briefly first.
First, don't worry, your mother will be fine. This is not an omen dream. It's just a reaction in your heart. Don't worry about what unfortunate things will happen in reality.
Secondly, I always feel that you have some vague feelings and worries about your mother, which depends on the specific situation of your family. It seems to have something to do with your boyfriend anyway. Let go of these anxieties about the relationship between family and lover, and you won't have such a dream. In reality, getting more understanding and support from people around you will gradually eliminate this doubt.
Finally, you should forget the uncomfortable feeling in your dream and live a happy life!