Hi all...been on a health kick which was going well, i've lost half a stone, but yesterday I bent down to talk to my friends toddler and felt this pressure in my knee and when I stood there was an almighty crack...now i'm terrified that I have injured myself in a dreadful fashion. My knee its now quite sore etc. I did think I trusted myself a bit at zings the other night to...what should I do. I've been taking ibuprofen and icing it. Well it cure in a few days? Will I have to try class with less lunges etc. help :(