We don't allways get what we want from situations or people and it is natural, that's part of life! I understand you feel hurt, we're often more bulnerable with people that we care about or that are suposed to be close to us and suport us and be there for us, but it doesn't allways happend like that. So don't keep thinking about that insident, it hurt you, yes but, think now about what you think about your self... Do you think you're doing your best to be a good mother? Couse that's what counts, and sorry I gotta say this but I don't think your mom is in the best position to judge you, so analized that. It matters to you that your first mother's day was ruined but... You will have so much more mother's day to come and it is problably goin to be more special everytime as your kid will grow and star saying "i love you mom" or giving you precents.
You just make sure you raise that kid to be a good human been, to learn to respect others, to learn to respect cultures, to be helpfull in society.
I'll finish now couse this is getting longer, but good luck!
Sincerely - colombian girl -