I had cracked my oil pan a while ago and resealed it. It started making a low rattling noise very recently and now it's just getting louder any ideas??

 

When you cracked the oil pan did it run low on oil? It could have damaged the engine if the oil got very low.

 

I don't get it, you say you cracked it, then resealed it. What did you use and have you checked the oil level lately? Maybe your repair is leaking. You should probably just replace the oil pan, to be on the safe side.