Ex-kabit kept on messaging me

Problem/Goal: I am having anxiety because my partner’s ex-kabet kept on messaging me.

Context: Last year, she even messaged me that she’s pregnant and my partner denied it as their relationship ended 2023. I even called her and asked my partner so she can hear, who will he choose because I really just want to let him go if she chose the girl. But my partner said he chose us (me and my son) and denied having her pregnant because their relationship ended so long ago. She insist that she is not a kabet and she’s a girlfriend. She wouldn’t be a kabet because she insist that we’re not yet married. We’re just going back & forth as she always try to message me on Viber. It put it on hidden chat.

Last week, this girl messaged me again, have been mocking me by sending a screenshot that my partner still chat her and message me “Kala ko ba happy family kayo😂?” Our relationship is going well. He goes straight home after work and even send me location. We go to weekly family gala and I sometimes post about it on my social media accounts. We’re okay. I’m happy. And I noticed when I post, she always try to message me. So I already blocked her. I don’t know why but she still managed to message me again on Viber last week even though I already blocked her before. I honestly don’t want to deal with her anymore but I sometimes caught myself tulala and thinking about it makes me cry. My heart is heavy these past few days. I have to take meds so I can make myself calm and sleep. I don’t want her to have a power over me. How do I move on? I want to save our relationship for our child and I can see my partner is trying too. We’re planning to get married this year too. What should I do? Do I unblock her and message her? Or should I let it go? We’re already 13 years.

Previous attemps: None