MASSIVE Custom Field OVERLOAD!!

Hey fellas! Hopefully ya’ll doin well! I’m using Custom Field’s to show thumbnails of the video’s in the main page, and when someone clicks on the title, wordpress forwards them to the actual post, where they can watch and review the video.

Until recently everything was perfectly fine, but few days back – I began to have problems with writing a new post, as whenever I clicked on the new post, IE or Firefox was freezing and the browsers were almost using 100% of my pc’s CPU!

Later on I found out that as I click on the New Post button to write a new post, whenever the page opens (for new post) it begins to LOAD all the PREVIOUS custom fields and database is so big that browsers cant handle it and get frozen.

I checked out codes, and they were alright as I havent modified them for a long time now.. Went back from 2.5.1 to 2.5 but the problem is still there.

Anybody has a clue??