So sore and only 50% weight!

I did two wods on Sunday, to get back into it, slowly!  First one I did was
3 RFT
200 m OH carry 25#
200 m farmers carry 25#
200 m run

I couldnt run with the weights because that caused my back to hurt.  The weight wasnt bad, felt pretty light.  The next wod I did was a very light bench press wod:
21-15-9
45# bench press
250 m row

I fet good after them, a little stiff but not bad.  I made sure to roll out my back with the foam roller.  This morning I am super sore though!  I used light weight and I am sore!!  Guess thats what happens when you are forced to take two weeks off.