Formal Pregnancy dress?

Say • Proud mom of a teenager 💙 2003 Then IVF with ICSI and PGS. Healthy baby OCT 2018💙🙏 Another miracle 💙🙏 APR 2020 Praise God

Going to a military ball with my husband and will be 8 months pregnant. Must be a formal, full length dress. Trying not to break the bank! Any suggestions?