Heartburn issues

I have been having heartburn everytime after a light meal. I'm no longer able to have a heavy meal like 3 times a day based on my doctor's advise I should split it to 5 smaller meals. I'm currently 8mth pregnant and my heart burn has been giving difficulty breathing and consuming meals like meat or rice. I had to puke everytime my heartburn cant settle down after 30mins. I'm losing weight as well. I used to have hyperemesis during my 1st and 2nd trimester but was treated previously with steroid. Medication sometimes doesn't work well for the heartburn. #pleasehelp #firstbaby #advicepls