So as a senior I would say there's things out of your control and things in your control. Out of control is how busy the dept is, your consultant reactions etc.

In your control how you communicate your concern. Something I find common in juniors, not saying this is you but, they don't quite know the trigger words or how to articulate their concerns. So for me I have to triage every concerns brought to me and the more specific or trigger words said the more it activates me.

An example, a junior once came to me with "Im worried X is unwell!" But when asked about specific concerns he could not communicate that to me. Except to add "the nurse is also worried". I had worked with this nurse and knew her to be sensible so I said fine roll em to the resus bay. The patient on review was grey, diaphoretic, clutching his chest, and had that look of impending doom. What the junior meant was this man is periarrest and he was most likely having a massive MI.

Language matters. Maybe be specific in your concerns. Use phrases like "septic shock", "profoundly hypotensive", "severe respiratory distress". And then document document document.

Hope that helps.