Can Microgynon Cause Delayed Periods With Pregnancy Like Symptoms?

hi i started taking the microgynon i had been on it for 3 days i had sexual intercouse i stopped the pill week later and started to bleed for 2 days so i started to take the pill again been on it for 21 days now and on the 7 day break but not come on my peroid but have started to get werid sid affects as if i am pregant i did a pregnacy test a week before my 7 day break but come back negative.