Suggest Remedy For Increasing Swelling And Bruising In Thigh

Hi...

I fell off my bike 3 days ago. The seat off the bike hit the front/inside of my thigh really hard. It was red and swelled considerably straight after. Then it was red starting to colour to a pale purple and blue 24 hours after. The yesterday i took a photo (2 Days after bike stack). At that point it was red/purple with blue tinging around the outside. Then i took a photo today and now it has grown by a 4 or 5cm in circumference. It is also considerably more swollen. The area bruised yesterday took up about 1/3 of my thigh. It is now taking up just over half of the front/inside of my thigh. It is sore/aching, though not intolerably so.



Should I go to the doctors or be concerned? I know I should probably stay home, keep it elevated with ice or something, but I have a lot of assignments at the moment and i can't afford to get behind.



What's your advice and why is it getting bigger/more swollen?