I had my last intercourse on 24 jan.in february i got period kind of bleeding for 2 days red colour bleeding and 3 days just light spotting in.in march just 2 days of very light bleeding with period like cramps.can i still be pregnant wd no symptoms?

Sustained "spotting/bleeding" episodes over the time described can be due to pregnancy located outside the uterus (ectopic). Obtain a serum HCG test, and if positive , see your gyn provider soon, as this requires immediate attention. If the test is negative, delayed ovulation secondary to stress (school, work, emotional, etc.) will delay onset of true menses, but see your gyn provider.