Sorry if this isn’t allowed here..

So when I found out I was pregnant my boyfriends sister came to 1 scan.. then she completely ignored/blocked me off everything (because she was jealous I spoke to someone) and now that I’m 40 weeks pregnant she’s suddenly back on the scene (coincidence) wanting to be his “auntie” now but she has been texting my boyfriend loads of rubbish about me! Like “I’ll always be his auntie” and slagging me off bad! My boyfriend hasn’t stuck up for me neither has my family! I’m sorry if this isn’t allowed in here but I really need some advice on what to do?! I feel so so down and I shouldn’t because my beautiful baby boy should be here soon☹️