Well, just as an aside, there have been many studies done regarding the effect of smoking on family members and even when a person smokes outside there is still a higher rate of asthma and other smoking related issues in the spouse and children (or house mates) of those that live with a smoker. I worked on a long term research study measuring these effects, so had to review all the literature. (Yes, it helps and decreases the effects upon you that they do not smoke in the house, but their can still be effects through the clothing, etc.)
This may not be the cause of your cough, but I just want you to know that second hand smoke can still effect you to some degree even if no one is smoking in a closed environment near you. It might be interesting sometime for you to have a urine test for nicotine or cotinine (Cotinine is an alkaloid found in tobacco
and is also a metabolite of nicotine.) just to see if you were getting some exposure somehow.
But, to be clear, I doubt that your problems are solely or even mainly caused by living with a smoker.
Yes, grinding teeth is common in those with stress and tension and often results in sore jaws. To start with you can consider getting a mouth piece to help prevent the grinding when you sleep. Of course the relaxation exercises, physical activity daily, will help to decrease the tension and teeth grinding. So you can always work to stop the symptom (in this case teeth grinding), while also work at resolving the underlying issues causing the problem.
As a reminder PTSD is Post traumatic Stress Disorder.
Yes, anxiety and susceptibility to stress can be hereditary in part, but also is influenced by the environment around you.
If your mother has PTSD, then you were likely to pick up on this and it is only natural for a child to experience anxiety if their caretaker who they depend upon is anxious.
If you experienced your mom learning coping skills to deal with her PTSD, you might have learned these too.
There are many factors to look at.
The main thing is though, is that we know that the brain has some plasticity, even as adults. This means that even if you grew up around anxiety provoking situations or have an inherited propensity to it, there are still coping skills you can learn and ways to decrease the amount of anxiety you experience. To be honest there is no magic resolution, and although medication can help, one must tackle the problem from several angles. It is a chronic condition, but over time one can learn how to relieve much of it so that it is not severely effected by it. Often lifestyle changes are needed. This may mean adding rest periods or meditation and deep breathing periods into your life, and of course exercise is very helpful in relieving anxiety which is caused in part by excess stress hormones in the system building up - you can 'use up' the stress hormones (adrenalin, cortisol) through exercise. Humans have always had stress, but in the past we responded physically by running, and worked it out of our systems so that it did not effect us as badly.
Some people may not need medication, but many do. This does not mean that learning anxiety relief measures will not still help you.