Hi and welcome to the GERD forum.
U may want to have a PH test done to make sure ur issue is too much acid as too little can cause the same symptoms as too much....
Also, ur Dr should have had u modify ur diet right away, meds alone can not help this issue, u do have to avoid the triggers, which is the greasy, spicy, acidic foods as well as carbonated and caffeinated bevs...even alcohol.
Then there is lifestyle tips as well....no smoking if u smoke, try and relax and avoid stress, no tight clothes, lifting or strain can also affect this so u have to find the root cause, if u have a hiatal hernia ect....
Urs may be stress related, a miscarriage can be long term stress...and that can be part of ur issue....
See the Health Pages for foods that r safe and foods to avoid, and lifestyle tips as well -
http://www.medhelp.org/health_pages/list?cid=236
Also try keeping a journal of what u eat and how u r feeling to see what ur triggers are, not all safe foods may be for u, so u have to try them and see...and eating more meals, but smaller meals during the day may help....