1998 blazer is making noise

What is your question?

My 1998 blazer makes a thumping/cluncking noise while driving forward but not while in reverse. Has been going on for about 3 days. Getting louder now. Any idea what it could be?

What makes this problem better or worse?

Only makes noise while going foward

How long has your 1998 Chevrolet Blazer had this problem?

3 days