I dont think that its the right time to ask for counseling, but I think that its a good idea for you to think about possible scenarios, and plan on how to respond.
I think that your message is pretty good. And of course, I think that if you do send it you should definately go dark after the convo. I think that its important for you to get the message across about the stress that hes causing you and baby though if he starts with the stalker-texting again.
I guess I gave the wrong finger to the wrong man...