Boob growth spert in your 20's?!?!

Has this ever happened to anyone! Boob growth spert in their 20's? So in the past 2 years I haven't really bought any new bras but have been having problems with them being uncomfortable and digging in and my lady's spilling out. I was wearing a 34B. I look in a mirror and I see what I would call average size looking boobs. I didn't and still don't think they look by any means large. So today I decided I want to shop for a comfy bra. I walked into Victoria's Secret and told the clerk my problem and she asked me if I was measured in the last 6 months, I haven't been measured since I was 15-16 and I'm 24 now. She measured me and told me I was a 36DDD! I told her there was NO WAY that could be right that seemed way too big for what I thought were average boobs. She handed me this HUGE bra and I told her there was no way my girls will fill in that bra! She insisted I try it so I did. IT FIT LIKE A GLOVE! I could not believe it! I ended up buying 4 bras because I felt so much better! No digging, no pinching, full support, and coverage and no spillage! She was right, I was a 36DDD. She is a miracle worker and my girls can finally breathe! And I got a sports bra where my girls don't bounce and stay in their assigned seats! I am so greatful the girl at Victoria's Secret helped me and saved my poor girls! And I only spent 75$ on 4 bras which at VS is so hard to do! Has anyone else gone through a boob growth spert in there 20's?!? I feel like a new woman!