Vague Ultrasound

28 and pregnant: My lump appeared 4 months ago and we finally got an ultrasound. Results were extremely vague, so of course I'm overthinking.

Findings: Targeted ultrasound was performed in the 6 o'clock position 1 cm from the nipple. There is an irregular lobulated fluid collection, measuring 26 x 13 x 6 mm. This fluid collection is just deep to the skin surface and there is peripheral flow noted.

Anyone experience anything similar? I have a surgical consult for aspiration next week.