Profuse sweating and feeling like passing out on period

Hi guys, i’m just wondering if this is normal or what it is. Every month at the second or third day of my period i’ll be fine and then all the sudden i start feeling very faint like i can’t stand up and i start sweating a lot and my cramps get really really bad. sometimes i throw up but mostly i just feel like garbage for an hour or two. i usually lay in bed or on the floor where ever i am for a while and sometimes fall asleep before feeling better. it only happens once during my period but it’s every month and i just wonder if anyone else has experience with this?