[Q] Nexus 5 not receiving OTA 5.0 topic

Hii I bought the Nexus 5 3-4 days back. It came with 4.4.3 and I was able to update it to 4.4.4. Can't seem to get the lollipop update. What am I missing? My friends are using lollipop on their Nexus 5. I thought the update was pushed weeks ago. How long do I have to wait? :(