You could be experiencing some of these problems as a result of your concussions. Usually, age related return of symptoms from concussions do not start until the 40's.

My first suggestion is to get a thorough assessment of your hormones done by a specialist in bio-identical hormones. Not a corner store specialist but someone who has built their practice on helping patients get balance back to their life. Some of these specialists will focus on women's health, others will focus on life extension and maximum performance.

You can get some referrals from https://www.womensinternational.com/..._referral.html

Once your hormones are in proper balance, the other remaining symptoms can be addressed.

IBS can be and often is caused by hormones. The female bowel slows at the time of implantation during each cycle to provide an opportunity for the intestines to extract more nutrition from the food passing through.

The memory issues can also be hormone related.

31 is not too young to see hormonal imbalance in women, especially after head injuries.

My best to you.