SAN FRANCISCO -- With 16 days until the election, those against gay and lesbian marriage are preparing a last minute push for Proposition 8, while supporters of same-sex marriage are organizing opposition and rushing to tie the knot.

Longtime sweethearts Demetrhea Terrien and Betsy York tied the knot yesterday and celebrated today with cake and other same-sex couples all the while looking ahead to the election.

"It was both joy and a refrained joy which is, that's the right decision but what's gonna happen next?" said York.

Berkeley's First Congregational Church blessed and celebrated about a dozen gay and lesbian married couples on Sunday. But amid the smiles was anxiety that Proposition 8 will pass on November 4Th, thereby ending gay marriage in California.

"We definitely wanted to be married before the election," said Mark Simon, a married gay man."We were scared that Proposition 8 might pass and we didn't want to be denied the right to be married."

Several couples here said the possibility of prop. 8's passage pushed them to marry sooner than they would've liked.

"We would've loved to have had a year or more to plan and we had no idea how much was involved in preparing for a marriage,” said Ken Barnes, a married gay man. “But I'll tell you, it didn't make a difference- we knew we had to do this before November 4th."

Reverend Adam Blons and Senior Minister Patricia Dejong say same-sex couples from outside the congregation are rushing here to marry ahead of the election. But there is also concern of what a 'yes' on 8 could mean for those who've already married.

"I think that there's a feeling that this is an important moment and a time to really seize and claim the right to marry," said Blons.

State Attorney General Jerry Brown last month said same sex marriages performed before the election will remain legal.

"It's hard to say,” said Chip White, press secretary for Yes On 8, a pro-Prop.8 organization. “We live in a litigious society, people can bring a lawsuit for any reason and usually do. And the Supreme Court will just have to deal with that if and when the time comes."

Prop. 8 supporters say it's unclear whether they will challenge existing same sex marriages if they win, but they credit a recent ad campaign as building momentum to prevent future gay marriages.

"What we credit the contributions to is that folks all over California, from every corner of the state, are starting to clue in and recognize the importance of voting yes on 8 to preserve traditional marriage between a man and a woman," said White.

Prop. 8 supporters will launch a "Get Out the Vote" bus tour throughout the state tomorrow with a stopover scheduled for Tuesday in Oakland.

Also beginning Tuesday, to accommodate last minute wedding couples, San Francisco's city hall will keep its wedding appointments desk open an extra two hours.