Pregnancy related. Of baby survival.

Hi doc my lmp was 10 July 2018 and I have apla syndrome and earlier I was taking heparin 5000 iu and on 15 January 2019 my doc told me that my amniotic fluid is 6-7 and from 15 Jan 2019 my doc increased my heparin dose 5000iu twice in a day and again he did my u/s on 22 January 2017 and again my amniotic fluid was 6-7 and as I am on my 28 weeks my doc asked me to get admitted. And before admission for second opinion I visit to the other doc and did my u/s on 23 January and she told me that my amniotic fluid is good i.e 16.8. on 23 January I got admitted in the hospital and they again did my u/s on 24 January 2019 and again my amniotic fluid came 4.5 cm. I am very confused and concerned that what I do ?should again I check with another doc as I am afraid that if my doc do my caesarean what are the chances of baby survival. Can the amniotic fluid decreased so much in a day and I am not facing any problem the baby movement is pretty good infact I can feel the movement all time. plz help