I dont know what to do.... really i dont.....pregnant 5weeks?

so i just moved to wellington after having my heart severally broken i dont have frends or family down here they are all in my home city.. i met a guy down here and we kinda were seeing eachother but yeah not really cos i wasnt ready for a bf...we slept together once and wow im 5weeks... he is a kinda complex guy and as this is my first pregnancy im worried as to what to do... we had a msssive fight last night and now i do know what im to do.... i cry alot cos im scared of whats hapening to my body it feels wierd im feeling allsorts of things.... DO NOT get me wrong i am happy about the pregnancy its all the other emotional stuff going on i just need to know what some other people would do... please if u can ....also i just found out that my ex hu hurt me so bad for 5 years is returning to nz to look for me.... awwww the only thing good at the moment is my pregnancy.... im still hurt and confused and im probably not making sense but if u can make sense out of this please reply....