HCG levels HELP !!!

Na

So my last period was August 11, 2018 I was suspected a period September 9 ( Sunday ) the actual day I started spotting I thought my period would come later but it never showed up .. later that night I took two pregnancy test and they came out positive.. so next day I went to the emergency room and they said my HCG levels were 79 and that was on 9/10 4 days later 9/14 I got blood work drawn and those levels came back 365 so today my OB wanted me to test again to see if my levels rise higher I’m supposed to be 5w6d today going off my last period .. mind you I went for an ultrasound Wednesday and they didn’t see anything.. I’m assuming my EDD is not correct and I’m earlier than I expected.. I’m so stressed out this will be my 3rd baby and I’m just all over the place !!! Please keep me in your prayers that my levels today have risen higher than expected!!!! Thank you ladies ❤️❤️