You can certainly ask that the police escort you to collect your belongings.  Explain the circumstances and see what they say.  I might consider speaking with an attorney about filing for a restraining order or order of protection if you are that afraid.  Once he is served then you can ask for an escort based upon same.  If the police will not escort you then I would suggest that you ask for help from friends and relatives.  But I would strongly suggest that you do not go alone to the apartment or house n which you lived.  It is good it seems that you have moved on to a better life.  Good luck to you.