###Human: Does missed period after taking Z pack mean pregnancy? ###Assistant: Hello. The fact that urine pregnancy test is negative, and as this is the first time that your menses have been delayed and there is a likely cause present- the throat infection and the stress factor during this month. So, stress as we know that it can easily cause hormonal imbalances which can delay menses, you are likely experiencing a stress delay. As you are already delayed by 10 days you can either opt for a withdrawal bleed with Progesterones now or wait for a week to allow menses to return naturally and if not, then use Progesterone pills for withdrawal bleed to initiate menses. Please maintain a menstrual calendar for the next three months to understand the pattern of your menses to ascertain the need for treatment for oligomenorrhoea.