What can i do

I slept with my ex about 2 years ago, at the time he said he wasn't wasn't anyone etc

Anyway he then went on to get with this girl, I find out he was speaking to her but not officially together so I left them to it and went on with my life.

Anyway I had him on snapchat and we wasn't speaking like anything, just as friends It was literally conversations about how we're doing in life, me saying basically complimenting his girlfriend saying she was pretty and that I was happy for them both etc nothing more.

About 3 months after that he facebooked me telling me it wasn't him on his snapchat and that him and his ex haven't been together for a while and that it was her, he also says she was trying trying set me up to fight me, he tells me she used to hit him and scream and shout at him because she thought my child was his ( he isn't his, I even had a DNA test which his girlfriend knows and it says my child is my exes who I got back with),

Anyway he rang me the other day telling me she has sent him my email address, my old phone number that is hooked to my email address, and a road name that leads to my road. (He doesn't know my old number or my email address nor Mt address)

I woke up this morning and had an email saying that someone had to sign in but google blocked them from accessing my account as it was suspicious.

Is this girl trying to hack my accounts? She hacked all of his old ones. What can I do? I was going to message her but he said not to cuz it'll make things worse for him.

It's annoying me because me and him aren't like that, my child isn't his and I am nothing to do with him.