Nel, the only advice is to go to ENT if it really bothers you.How much of saliva we have, mostly depends on your autonomous system operation, which seem to be severely involved in BFS. In your case you may have some dehydration due to long term stress. Stressed people usually first complain for hypersalivation, they complain for 'drooling', etc. In several days or weeks of stress they started to lost water via urination (increased due to adrenaline spikes) and, especially if they are not used to notice that, start to develope some dehydration. This may cause your saliva to be a but thicker that usually, or may casue dry mouth etc. Mouth breathing due to swollen noze may also 'help' with this feeling of thick saliva.as for your sinuses, they may be just swollen. This may be so called vasomotoric snivels (directly translated from related Russian term, have no idea how it is called in English) - but in fact it is stress related swelling of nazal mucosa, pretty much the same which causes tightness in the throat our fellows often take for bulbar symptom.