Why did my ex call? especially after the police told him not to contact me..i know its long but please...?

The begining..Ok my now ex and i found out im prego on fathers day. He went to the pool, I went to work. I got a call saying he was in the pool with some girl. I go there sure enough he is and we get into it. Then we made up. Then monday same thing basically. I told him to get out he cried i believed him. He basically did nothin but lie to me from the moment he met her. -she just got out of prison for dealin meth so i know he didnt know her before fathers day oh and she was engaged- Tuesday night he said hed brb he had to get something well he didnt come home till wednesday afternoon -he cleaned out my bank account all night also- so i had the locks changed wednesday morning. when he did come home tho he said he lent the money to a friend so he could get stuff for his baby and hed pay me back that frieday. -that was all a lie he spent the money on that girl- anyways i let him in the house so we could talk because i still wanted to believe him so we did and then he ran off again -now i know it was with her- but then thursday night he said they had to go save her 14 yr old sister from being d so i let him go -it was all a lie so he could go have in a parking lot with her- but he told me hed be home in a lil bit and that he loved me. well needless to say he didnt come home til friday morning when i told him we need to seriously talk tonight. well friday night he came up to my work asked for a key to get in cuz he worked all day..and he promised me hed be at home waiting for me so we could have dinner and talk and he kissed me and looked in my eyes and said i love you. wellllll the chicks fiance came up to my work friday night..he told me he had proof they were cheating and he put her stuff out so i called my guy and he still swore he hadnt touched her but he was moved out and on his way out of state to stay with family...well her fiance was like honey hes still lying to you hes with her at some crack shack 40 minutes away. so when i got off work i went up there i wanted him to look me to face me..he wouldnt..he couldnt even look my direction - i may have had a few choice words for him- but anyways one of the rednecks started waivin around a gun and threatining me and my ex did nothing...so i left and called the police and they went and told him hes not allowed to contact me or come near my home. well...saturday night at 1:30am i got calls from blocked numbers...i knew in the pit of my stomach it was him so i didnt answer...when i woke up on sunday i called her ex fiance and asked if he got any phone calls and he said yea and he answered em but it was her and she wanted to let him know that her and my ex are "official" and did she get any mail...lol wtf...(i was like so it wasnt official when they were screwin in a parking lot cheatin on people they supposedly love...cly..) ...im just curious as to why yall think he would call..i mean it boggles me..he couldnt even face me..he knows im high risk due to blood clots and can die..i ended up in the hospital b4...its been 2 weeks from this past friday...why would he call? im 22 and hes 24 if that helps..ps the baby was his idea (everyones in shock hes always been such a family kinda guy even his brother doesnt know what to say)