Getting so annoyed by 🤱

I’m still nursing my 2yr old and my plan was just to let her wean herself. But lately I find that I get really annoyed when she asks for it. She also loves to just play with my nipples while she’s falling asleep or watching tv and also while nursing. I’m finding it super annoying and just want her to stop all together. Maybe it’s because I’m 20wks pregnant or maybe I’m just over it, I dunno. I try to hold off on letting her have it but she freaks out and I end up giving in. How can I get her to just stop all together?!?