Anxiety attacks..... is this normal??? plz help me!?

ok so i am a 15 year old girl that lives with her mom and dad and brother. but we hav a BIG problem with my mom's health. around a year ago she started having random anxiety attacks. her hands get cold, her feet get cold, she says her heartbeat increases, and she just gets anxious! my dad works everyday and my brother doesnt help much wen she is having an anxiety attack so it leaves me to comfort my mom wen she is anxious. i try to be strong for her and be there with her but it has been going on alot! i get scared to c her anxious and i try to be there supporting her. my mom is 39 years old and we've been told by doctors that this could be normal since her age is 39 (menopause, hormone changes, etc) MY QUESTIONS IS: IS ANYBODY ELSE OUT THERE GOING THROUGHT THE SAME THING? OR HAS GONE THRough it? i need to kno how to cope with this and try to make her feel better. also is it actually normal for this to happen at this age? im scared because it is affecting me now and im anxious too! HELP