Ok first vent online Mother and Issues

 So lately or for a while now I've been wanting and trying to talk about stuff to my mom or kinda of anyone right know but I can't. When Ever a subject comes up and i think I can bring it up slowly they kind if backhand it. Like I love my mom I do but when I hypothetically bring something up or say something slightly like my problem she says something insulting about it like if to say " that's not a real struggle" and she used to all ways tell me I can talk to her then she goes and does that shit. Like one time like 2 months ago my sister, her boyfriend, other sister and my mom went to a store ; and for context I collect plushies like if there cute I get it ..... any way I saw one and grabbed we play around like "omg she found one" laughing and my sisters boyfriend asks "what's up with me and stuffies" my mom tells him she doesn't now that I've always been like that. He then says "Is it like a trauma thing" and in the back of my mind I say maybe you know because idk MY MOTHER WHO COULDN'T "CARELESS" ABOUT OTHERS WOULD TELL ME I CAN TALK TO HER ABOUT ANYTHING THEN TELL ME TO STOP CRYING BECAUSE WHAT I SAID AND FELT WAS STUPID IN A LAUGHING MATTER..... anyway she just said "no!? Idk" like really..really huhhh