My menses cycle already 37 days. Does it mean that i might be pregnant? Usual cycle is 28-31 days.

Are you showing any other symptoms? For example, sore boobs, darkened nipples, nausea, weird cravings? It could also be due to stress or sickness -- my usually regular cycle tends to get messed up when I eat antibiotics. Agree with the mommy above, best is to take a test or see a doctor for confirmation.