Your going thru the thirty something thoughts, I've known a lot of women, who when they hit 30, they think about things they may have missed out on or want to try, it will pass but there is definitely something missing in your life either relationship wise or experience wise, go achieve something you've been missing or do something you really want!!!
Your welcome, wish you the best :)
I read your question wrong , so sorry ...
You will find someone when the times right and when your not looking ... make sure he's a keeper and don't settle for just anyone
You still have plenty of time for marriage and children.