Is this at all plausible?

Hello.
I had an appointment to check out my breast lump at the hospital on Tuesday.

The doctor examined me, and then asked me to point out the lump.
Typically, I couldn't locate it at the time, and so could not point out the lump, just the approximate area. Was a bit embarrassing and really frustrating for me, as I'd felt it earlier that day.
Anyway, I had that area looked at with the ultrasound wand thing, and the doc said it was just normal breast tissue.

Got home, and suprise surprise, I can quite easily pinpoint the lump again - must've been the pressure of having to find it for the doc there and then.

I should be feeling relief and have closure on the issue, but I can't help thinking maybe they've missed it as I couldn't pinpoint it exactly at the appointment. It's quite prominent to touch, so I'm really frustrated I couldn't find it at the time.

Do you think my worry is at all plausible or should I just shut up and accept what they said?
Many thanks all. Sorry if this borders on the ridiculous.

It's not ridiculous, but if you've had an ultrasound it's probably safe to assume you've just got normal breast tissue that feels a bit lumpy.

Considering they did the ultrasound in the area, means its probably fine. You are not being ridiculous at all, I have had exact same thoughts before myself.