Am I the wrong one?

Last night I called my mom to see how she doing, it feels like every time I call she wants something. She wanted me to go with her to the ER. I already done so much for her it's stressing me. She puts me in the middle of everything. And if I don't help her she makes me feel guilty. But I told her why did she want me to go with her? She wanted me to get checked out too. Everyday after school I suffer from migraines and I just sleep it off since I'm pregnant. She gets mad cause I don't want to go with her and I start feeling guilty and while I'm sleeping I'm stressing so bad my head is pounding. When I wake up, I get a message from my aunts husband, he calls me freaking out cause he said my aunt left him! He keeps yelling at me to tell him the truth. My aunt is another one I help too. He goes on about how he's going to my moms house were the kids are and he's going to do something we going to regret. I try not to stress and call my mom who still in the ER at 12am with my brother and tell her the situation. She said it was my fault for not staying with the kids, I'm like wait a minute you wanted me to go with you to the ER. I'm done. My mom is just crazy now and she going threw a lot. Stealing from my dad, not having the kids go to school for 3 months. She acting like a total drug addict when she not. I finally know the real women she is. It breaks my heart. Now I'm left with the guilt and shame I felt these whole years. It's stopped me from being intimate with my lover. I don't know what to do.