Boundaries and anxiety

Hi I’m kinda scared making this post because I know some people can be really mean and straight edge which is not what I’m looking for . I just want advice from someone who gets the struggle I’m facing . To preface I am a 22 ftm and I have always struggled with really bad debilitating anxiety . I’m a bit of a people pleaser strictly because I’m scared of anyone getting mad at me or being mean to me . I have a very hard time saying no due to this . Previously I placed down a few boundaries for everyone before our baby was here and nobody is really listening or even caring to respect me . Again I’m extremely scared to speak up but I KNOW I need to get over it , but it’s really hard . A lot of these people I feel are really just trying to press button after button to see how I react and paint me as a bad person . I’m slowly getting more and more aggravated but I don’t want to approach it in a mean manner but I feel like being stern and speaking up makes me seem mean . Once again please no mean comments I am really struggling and this is my first time being a mommy , everything is so new to me and my once already bad anxiety is just 10x worse now . If anyone would be willing to chat I could private message and explain more or any advice from women who were once like me , or any kind advice would help . Trust me I already beat myself up about it everyday because I sat these boundaries to keep my baby SAFE because that’s my main priority but I didn’t take into consideration how hard it would be dealing with when they are broken.