Work and drugs

Baring In mind I’m 12 weeks and 3 days pregnant...

Someone I work with has said I smelt of weed and has told the manager but the manager hasn’t spoken to me. I have never touched drugs let alone know where to start with even finding them. I’ve never been around people that do drugs either. Im a care assistant for the elderly and now I’m really scared that I’ll loose my job. Anyone been through something similar being accused of something that couldn’t physically be true and what happened to you? 😞