Not mom related but I need opinions.

My sister in law approached me and my mother in law with the idea of starting a crafting business together. We each have cricut machines, but my mother in law and I are the more crafty out of the 3 and my sister in law is more of the financial and social media aspects of it. I’m a stay at home mom so I’m the only one out of the 3 who doesn’t make any money. When I said yes I was under the impression that some money would be put into the business and the rest would be split, but later was told that they decided to just put it all into one account that we would use for family vacations. That’s not where my issue is. My issue is they know I don’t work and we just bought a house I can’t put much in financially, even tho I offered to put what I can but then was told I didn’t need to worry about it. We have had a couple of orders but I was told little to nothing on them and was never asked to help out on those orders. Some ways I do try to contribute is by posting on social media, when I did find out about one project that required resin my MIL was struggling a bit with bubbled and I helped with the research on that, and I try to give in input when asked. We just received an order of 30 shirts and I kept asking when we were going to work on them and it was sprung on me the night before that we were going to last night. I woke up yesterday with some severe stomach pains all day like I almost went to the emergency room. When they called to ask if I was still coming (knowing about the stomach pains) and I said I was still in pain I was met with a “okay just stay home” but it sounded kind of like they were annoyed. They are going on a trip this Friday for a week and the order is due on the 5th. I tried offering to work on it while they were gone and was told “it’s such a large order we don’t want to risk messing it up” which made me feel untrusted. Then when speaking with my MIL this morning I was saying how I felt bad that I couldn’t come help especially because I haven’t had the opportunity to contribute much with other projects but can come tonight. I was cut off and told “yeah you have done absolutely nothing to contribute” is the most petty way and that they decided to outsource the printing which is going to cost them $90 and that I can just stay home because pressing the shirts only takes 10 min and really only needs one person. This makes me just feel like I should just completely pull out because they know my circumstances and I just feel unappreciated. Am I overreacting?