Prostate Massage

Hello,
I've tried to massage my prostate for the first time.
the thing is, and it's not very nice to say, probably neither to read, I have a lot of farts and I have to go to poo a lot. that's only half of the problem, because the farts can sometimes actually hurt, and when I poo, it's big chunks that get out immediately and leave some pain.

How long will it be like this? can I expect it to be over by tomorrow?
Is it only like this the first times?
What can I do when this happens to me?

Thanks.