How do you deal with mean sisters?

I feel like I'm at my breaking point. I am the oldest of four kids and I have sisters who are twins and two years younger than me. They can honestly be very cruel and mean. They always argue together towards me, they would never go out of their way to help me or simply never respond to my messages, isolate me from activities, and insult me. Today was my breaking point because I didn't realize I bled through my scrubs (I haven't gotten my period for 2 months due to stress so I was so excited to tell my mom and sisters the good news). I called for my sisters to please pass me new underwear so I can exit the restroom (my dad was in the living room). They said no, no , no. I erupted after 20 minutes of begging them through the door to come here so I can tell them and ended up screaming I HAVE BLOODY UNDERWEAR AND PANTS DRIPPING PLEASE COME HERE AND BRING ME UNDERWEAR PLEASE PLEASE. I was so embarrassed to do that in front of my dad and kinda hurt they wouldn't even get off their phones to come ask me simply if I was okay.

They constantly make fun of my personality saying I'm too nice, my weight (I'm more curvier than them) and isolate me. I begged them to go on a hiking trip with me but they declined because they had an exam coming up in 3 months. I also just found out 2 days ago they both went hiking together without me secretly. It kinda hurts me although I understand I should have my own friends my own age. My parents don't say anything at all, and yell at me if I say something, except one time.

Also I usually do 95% of the daily chores, expected to clean after them and my family, take care of my little brother (sometimes I feel like a single mom) and get insulted by my parents. I do my best not to engage but tbh... I'm tired. I don't know what to do.

Any suggestions for better communication with them? I genuinely love them so much and want us to have a good relationship. Thank you so much for reading.

How do you deal with mean sisters?
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