LOS ANGELES - JANUARY 10: Lolo Jones, Houseguest on the CBS series BIG BROTHER: 

CELEBRITY EDITION, scheduled to air on the CBS Television Network. 

Lolo Jones got candid on Instagram today about starting her fertility journey. 

But outside of being a fierce competitor and wanting to win Olympic medals, 

one of the things Jones has longed for the most is becoming a mother.

In an emotional post and video, Jones reflected on her upcoming 40th birthday. "Terrified. 15 days before I turned 40. 

nothing has scared me more than feeling like I'm running out of time to have a family," she wrote in her caption.

Jones originally wanted to freeze her eggs when she was in her early 30s. 

But "I just kept thinking I will meet my husband and things will all work out. Well here I am almost 10 years later and it hasn't," she wrote.