Weird periods

Hey guys, im thinking about going to the docs about this but always feel really anxious there. But basically past few months my periods have been pretty heavy where I just can't get up and when im in work I just keep breaking down due to the pain to then other times it's just so light with no cramps ect. However recently just before starting I keep getting a bit nauseous and feeling weak to then having a spurt of energy where I feel I can do anything. But today I've just started and again it feels weird where my lower stomach feels more numb, and just had to get out the shower due to having awful tunnel vision to the point of not being able to see.

I know I should go docs but along with my anxiety I just feel like I've wasting their time if it's nothing abnormal😏