EGR valve replacement and runs terrible?

And don't know if anything else is going on.

Alright, is the check engine light still on? Scan for the codes again, what is the number code or codes that pop up? Just replacing a part as you found out doesn't always fix the issue. You might have other issues, like a leak in one of the vacuum hoses causing the issue. Post your answer below.

Exactly , don't make assumptions , the problem erupted by pure coincidence and may not have been the sensor . The code tells you where the problem is not always what to replace ,