I was having a filling on thursdays it hurt when he was drilling a very weird pain, when the numbness worse off i had tooth ache bad, and for the last few days i cannot let anything cold or hot touch the filling or it hurts and today(sunday) i have tooth ache again what could be wrong

You might need a root canal, more than just the filling, since the decay might be deeper into the root. Did the dentist put the permanent filling in? Sensitivity to hot and cold can indicate the need for the root canal as well. Only have an endodontist do the root canal, if possible. At least, go in for a consultation, if the pain does not subside. Does it hurt to bite down on the tooth? Another indicator for an R.C. too.

You might need a root canal, more than just the filling, since the decay might be deeper into the root. Did the dentist put the permanent filling in? Sensitivity to hot and cold can indicate the need for the root canal as well. Only have an endodontist do the root canal, if possible. At least, go in for a consultation, if the pain does not subside. Does it hurt to bite down on the tooth? Another indicator for an R.C. too.
yes it does, what happens in root canal