A simple blood test will let you know! You need to ask for a thyroid anti-bodies blood test. Yes, Hashi's can be a genetic thing passed down through the generations. It acts like being hypothyroid , the weight gain, sleepiness, etc. It can then move into a hyper stage, anxiety, weight loss etc..then go back to hypo..of course all this takes years and is very hard to pin down to being Hashimoto's disease, but once tested and it is positive, it gives a better chance to deal with it.
Often, not always, Hashimoto's patients have more than one auto-immune disease. So, in your case it would be well worth having that test done.
Good luck!
Ask your doctor about getting tested. It is supposed to be genetic, so there is a chance that you could have it as well. Testing will let you know.