Hi and welcome to the GERD forum.
Not everyone will have heartburn with reflux/GERD...so it is very possible that u do have it...I would u modify ur diet to include healthy choices that r not foods that will trigger reflux...Chocolate will and not eating will too....so eat but more frequent and smaller meals to help absorb the acids.
Also if this persists, ask for a PH test to be done,....low acid can cause the same symptoms...so it is hard to know without testing...but if u get the OTC med and u feel worse that could indicate low acid levels.
It is more likely to be high levels with stress...but with out testing and modifying ur diet and lifestyle it will be diff to calm down,
Look at the health pages for tips on foods to avoid and tips on how u can modify ur lifestyle too.
http://www.medhelp.org/health_pages/list?cid=236