Join a union now.
Do you have any long term health conditions which you might need to ask for reasonable adjustments for?
Are you a member of any other group protected by the EA? Is reasonable to raise a concern that people are behaving poorly towards you because of this?
Make a note of everything that's said to you and keep a copy of all relevant emails.
Meet all targets but don't agree to targets which aren't achieveable. If their targets rely on you working extra hours, unpaid, document it and raise the problem. They can't sack you for refusing to work for free.
Start looking for another job.
Whisperings, constant changes, favouritism.
If there is a pattern of bullying start making a journal of what happens and when. Once you have a solid basis raise the issue, following your company's policy to the letter.
Basically- getting out is the easier option but don't just take anything in a panic. In the mean time make it damned hard to sack you so that if they want you gone they have to pay you off.