Am i wrong?

Me and my boyfriend have been arguing for the past few days and his mom has been fuling it on his be half. His mom told him that i shouldn't be so tired and sleep so much and if i am tired it means im not taking my vitamins. She said vitamins quickly replenish me and should keep me from being tired. I had sleep issues prior to pregnancy. I try and go to sleep at 10 every night but my mind don't let me. I fall asleep anywhere in between 10-12. I wake up at 4am to take care of my brothers because thats when my mom leaves for work and she has no babysitter. If the youngest is still asleep ill get maybe and extra hour or 2. By the time my mom gets home at 2 im worn out and sleepy. She saying i shouldn't be tired because i could do it prior to pregnancy. But also i drank a lot of caffeine before pregnancy. When i went without it i could never stay awake a full day and my naps lasted up to 6hours. When i deffend myself she says im calling her a liar because she had medical training and 3 kids. She had medicine training she knows medicine not babys and pregnancy but she acts like she does. She had 3 and this is my first but when i tell her im not going to be like her she cries to my boyfriend and says im treating her like shes stupid. I talked to my aunt whoes job litteraly is an ob nurse and she said im normal and i talked to my Dr. And she said its normal but his mom keeps throwing a bitch fit and saying im wrong and hurting me and the baby. I told him if he wants to be involved with my pregnancy then he needs to come to me about his concerns and not his mom. Im the mother of my child and im not going to hurt her or myself and i know what im doing and i always ask my aunt or my dr about my concerns if i feel something is wrong and he needs to trust me. Shes saying im trying to keep her away from her grandchild. When all i said was i know what im doing. I never once said she cant see her grandchild or ask me about her concerns but im not dealing with her crying when she gets disagreed with.