Has anyone else had this while being pregnant?

i am 39 weeks and 1 day and i went to the hospital last night and my blood pressure was running high like between 140 and 150 on top and 80-92 on om and so they kept me over night to monitor it and it was fine all night and this morning so they let me come home but everytime i go pee i have to dump it in this jug and take it back to the hospital and get tested for preeclampsia they dont htink i have it but they want to be sure. has anyone expierenced this and how do i know if it gets high at home where i dont have a machine to check it. ?....id anyone else went threw this and can tell me about it i would greatly appreciate it i am scared.