Hi Catherine,
You can visit this website if you want to know the updates of your application : ukvacs.net.
Since you already have filed i guess you have to wait for the results. If you're travelling back to England as fiance visa then check the requirements on : www.ind.homeoffice.gov.uk. You will be under the family/fiance/spousal visa column.
With regards to your documents submitted which you said you already have the letter from the priest confirming the wedding, if you show them to the Embassy they might give you less than 3 months waiting time. That still depends on the queue.
Date of Return ticket can be cancelled or be changed.
Just make things one at a time to avoid pressure. You should have not booked for a return flight since you are not yet sure of the approval of your visa. Anyway, Good luck and best regards..
