Responsibility for others driving me to breakdown

Just been crying and had a mental breakdown. I've been good with money, spending within my means, but parent keeps asking for more and more for things not needed, basically extras. Sibling going to uni and not getting a job, when I was in uni, I had to pay for everything myself except for the first semester which was paid with the help of my parent. Worked my butt off and managed to do it. Now that my sibling is in uni, I'm always asked to help out to get a job to help the family for a trip later this year and sibling is not getting a job or hard enough. I am so tired, everything always come back to me having to do stuff. I worked since I was legally able too and basically have almost always been employed, I don't overspend and just want a relax life, but everybody is pushing the responsibility onto me. I am so tired and my mental just finally cracked. I just don't know how to feel, I just want to escape this

for a while.

How do I stop this feeling and just escape for a while, like I just need a break for a couple of days from this stress of hey you need to get a job to pay for all of these extra things that we did.

Its just so exhausting since I myself don't spend much on myself. It's always payments for other people.

I guess in terms of the job stuff I'm just going to say no to them since I'm so tired and am supposed to be on medical leave from the doctor to fix health up anyways, but they still want me to get a job instead of focusing on my health. Though just need a way to manage the stress and thoughts of them brining up topics of finances etc, I'm tired of this.