Ultrasound shows ovoid hypoechoic lesion : Should I get a biopsy?

I recently had a breast ultrasound. My mammograms have always shown I have dense breasts and approximately every 2 years I do the follow up ultrasound.
For the first time the ultrasound showed an ovoid hypoechoic lesion in my right breast that is 4 cm from the nipple. Its size is 5x3x4 mm. No internal flow. No suspicious solid appearing right breast lesion is demonstrated.
The radiologist rated this as BIRADS 3 possibly benign and suggests a 6 month recall.
My left breast was clear.
My doctor said if there is any change in the 6 months, a biopsy will be recommended.
Is this normal procedure with these findings? I’m wondering why they don’t just do the biopsy now to eliminate the stress and worry I will have over the next 6 months! On the other hand I don’t want to jump the gun and get testing that may cause unnecessary outcomes.
I’ve been dealing with other health issues during the past several years, but this is something I never expected. I’ve only just now started researching this and trying to figure out my options, hoping to get some thoughts from those that have dealt with or are dealing with this situation.
Thanks!