I'm expecting to be pregnant, but i missed my period for 2 days and afterwards it came. pls why is it so? could i be pregnant?

When in doubt: just check pregnancy test. And if you are still not bleeding normally and first pregnancy test was negative, check it again in 1 week. Sometimes you can have normal fluctuations in your period without significant infection. Many common things like exercise, nutrition, changes in atmospheric pressure can change a period. If not, visit a GYN or family physician. Thanks for trusting in HT.