@Icecream sounds like you are carrying a lot, and I do think it's a pretty common thing for sure. Sometimes if we carry stuff for others for a long time, it can end up overwhelming us, and we might end up breaking down - sometimes to the great surprise of those we've been supporting. Or we might see how exhausted and overwhelmed we've become, and try to pull back a little, which, for those who are so used to leaning on us, can be a bit of a shock. They might even feel 'let down', which can sometimes lead to conflict... even though we are always allowed to protect our own energy and take time to recharge and focus on our own needs.
Have you got anyone outside of your family who you can talk to about what's been going on, and how you're feeling?