Ahhh poor you.
Look, you are not being silly. You have a biological clock and a it's ticking loudly- nothing to be ashamed of in listening to it!
However, you have a good 5 years left ( or more) in which to have kids.
What's your track record so far with men? Long relationships, short ones, none at all much?
What are you doing to meet men?
All you can do is widen your social circle- the usual cliches- clubs, internet dating, singles holidays, work???, friends of friends...
Whatever you do, don't settle for Mr Wrong just to have kids.
And don't please make it clear you are desperate as many men will run for the hills.
I've got friends who married at 35 and popped out 2 kids before they were 40. You might meet someone tomorrow in the supermarket! Don't give up- but don't just sit waiting for mr Right to drop by- you do need to get out there to be found.