muscial bound

I been drinking Lactaid Milk for a couple years now, but the last few weeks, the milk is starting to taste weird. The first batch was just spoiled so I thought it was just not transported correctly and got rotten. But even the last 2 times I got it, still tastes a bit strange. No longer spoiled and foul but still slightly thick... Anyone else have same experience? This is milk with expiration date early Sept to early October 08..