Aih, jangan worry sangat lah, size baby lagging behind dates memang boleh jadi normal, terutama kalau dating calculation salah or ovulation you lambat, so the scan dating might actually be the correct one. About the cyst, sebab ni first time you punya, best you discuss detail-detail dengan your doctor sebab dia tahu full picture of your scan, a few of my mum friends also had cysts early pregnancy and alhamdulillah fine je, but yours kena follow-up specially so the doc can monitor. Can't really "grow" baby faster than nature intended, but focus on good nutrition, minum prenatal vitamins, and rest properly will support baby's growth nicely throughout your weeks ahead.