Everyone has left worried

[Ithurtbad]

I feel very anxious about returning to work and I feel very pressured.

My manager whom hired me left Saturday and couple of other colleagues.

So I had a conversation with my manager before he left and this nightmare colleague. We have a young guy in his 20s whom assistant manager and now he store manager he really is good. I respect his position but can see this colleague who a nightmare just walking all over him.
Today I had to call him about something but was checking to if he okay. This colleague answered she seemed okay.
I also had to tell him may have to change my appointment with midwife as think it's day I return but he like I will change it.
What's bothering I don't want him to leave so need to try get him to have until after Christmas. Say we deal with her together if she starts and tell regional manager. Even another colleague said she couldn't stay and deal with her and said he will need help with her.
I am currently 23 weeks pregnant don't actually need the stress and somehow I need to make it until maternity leave which my feet is swollen which I know is normal. But on my feet for 4hrs it's a struggle as it is.
I know it's not my problem all of work stuff but already don't know how I will survive Christmas as we work in retail.

Any advice?

I'm not sure what you mean by returning to work. Have you been off sick?

So, this is your manager, and the 'nightmare' person is your colleague? If that is the case, it isn't your place to deal with her. Your manager needs to do it and not let her walk all over him. If it needs escalating to the area manager, then the store manager should do it, not you.

Yes I been off work sick and will go back Monday. I am finding it very difficult already with my health and really don't need this colleague causing problems. My store manager now won't be able to do much so I have to force him if she gets too much to keep calling regional manager. Like the my old manager said he not a person who confrontational.
I do have a feel he will leave and really don't want to be left with her. They will need to get a brand new store manager too.
I am in situation I have no choice but to stick this out. I normally stressed with wondering how I will get through work but being short staffed makes it worse.