My SDHC card stop working

Suddenly my card just stop working by no damage or anything.cant find it if i use an adapter and put in my computer either.

I’d say it’s time for a new card.

I dont want to hijack this thred but my 16g did te same thing this morning. I had it in the reader and ws deleating and sorting files, I ejected it properly and put it in my phone amd nothing. Now myphone or pc cant find it. About a year old. 14 of stuff gone. I head I can send it to some forensic place and they could get the stuff off of it. is this true and what doesit cost?