You You might need anxiety meds I am on them for other reasons but stress is a trigger of mine enjoy your thirties your still young you just feel old because it’s a new phase of life college life and high school are over. But your not 50 like me lol maybe you will meet someone yet I didn’t till my forties so I felt really lost and lonely during mine but get out there and have fun

Maybe ask your primary care physician or your neurologist.

As far as entering your 30’s, I personally did not find it difficult. My 30’s we’re just as fun as my 20’s. Remain active and enjoy everything.