What Causes A Delayed Period After Taking Reductil?

Hi, may I answer your health queries right now ? Please type your query here...I have been taking Reductil for 10 days. I took a home pregnancy test before I started the course and it was negative. My period is now 5 days late I am worried I might be pregnant but am also aware that Reductil can affect your menstrual cycle. What do you suggest?