It may not feel like it right now, but you made the right decision by calling to ask for the police department to do a welfare check. You now know that the sick neighbor is well enough to make her own decision not to go to the hospital, so whatever happens, you conscience is clear. You would not have had to call at all had the sick neighbor not kept texting you to come see her, while M was trying to keep you away without telling you why...

It sounds like they were playing games with you. But by doing the welfare check, you showed them you are not playing games. You did not call 911, so they can't say you overreacted.

I don't know why all these women decided to gang up on you all of a sudden, but usually being a good person does not, and should not, come with such heavy consequences. I don't know how they all found one another, but they deserve each other, and whatever lousy things are coming to them

Stay in your apartment, don't answer the door, and ignore their calls and texts. If you see them in the hallways, walk on by. If they try to speak to you, keep waking. Hopefully if they don't get the reaction out of you they want, their antics will not be as fun for them, and they will stop harassing you- at least as much or as often (((HUGS)))

Hang in there.
Kay