Urgh, I have a period like this about once every 3 months or so. It's bloody awful OP 
If it makes you feel any better, I once came on unexpectedly early at work. I bled through pants, leggings and a thick woolen jumper dress... of course it was cream
. Worse still, I completely flooded my chair within the space of an hour and it was lime green, so mixed with blood it looked like poo 
It's an open plan office in a male dominated environment. The stain on my dress was about the size of a side plate and bright red, and the chair stain was the size of my hand and a dirty, poo-brown.
I had no tampons or pads with me (unexpectedly early period) and no coat, so i scooted on my chair all the way through the office until I reached the receptionist (only other female in the building). I got a few funny looks as it's a very long office and it was a bit weird, but no one commented. I was crying slightly by the time I reached her and mercifully, she was a complete diamond. She walked behind me so we could get to the loo unseen, then nipped out and bought me a new dress, leggings, pads and pants from Tesco across the road. On her way back she hid my chair in the store cupboard and got me a spare one.
I returned to my desk an hour later in a completely new outfit having scooted out on a wheelie chair, and not a single person raised an eyebrow 
I'd never said two words to this lady previously, but we're now good friends and have been for 5 years!