So I still have problems being open and telling my parents things..?

Ever since I was young I had a serious issue being able to tell my parents things, asking for favors, being open with them etc especially my mother. I was always afraid of them being disappointed or upset with me. I'm 22 now and I realize I still have the same problem. I moved out about a year ago and I'm living with my Fianc�e in our 4 bedroom home, we completely support ourselves neither of our parents help us financially. I work part time and go to school full time and he works at a car dealership. My mother has always been the kind of controlling type but in a lovable way. If I ever did something she thought was dumb or silly to her she'd always voice her opinion loud and clear. But now I'm concerned that even though I'm on my own and am older now I'm still afraid to share things with her that she might find silly or dumb in fear of her being disappointed, and I know this sounds weird because I'm 22. Heres an example of something recent, I'm going to school to become a vet tech. I love animals, always wanted lots when I got on my own, had always planned to have alot. My fianc�e and I have two dogs and a bird but we're getting third dog in a few weeks and still haven't shared the news with my mother. She somehow heard something from someone about it and told my sister that she wouldn't help out in any way with the wedding if I got "another stupid dog" (you can tell she's not an animal lover) And even though I know she probably still would it really hurt my feelings. Like me getting a dog is that big of a deal? Its not like I live with her or she financially takes care of me. Now shes scrambling around, pestering my fianc�e about me getting the dog (I still haven't confirmed or denied this to her) I'm even reading this and realizing how pathetic I sound but I still can't find the courage to just tell her because I know how mad and upset she'll be and I hate upsetting her. And the dog thing is just an example it's like this with just about everything. Sad I know. If anyone has advice that'd be awesome thank you