I'm sorry to hear that. My team is actually excellent about communication for ongoing work, and I still feel the way I do - I'd be waaaay worse off if I felt like people were forgetting about me.

If I could offer some unsolicited advice - tell them that you feel that way! I am quite confident that no one wants you to feel abandoned, and they would be unhappy to know they're making you feel that way. They might not be able to fix the situation all at once, but I hope you're able to get a better situation soon, one way or the other.