I don't think that the advice I give is really so bad...
-Testing for sexually transmitted diseases? Most modern infidelity-recovery books would recommend this; as would anyone who has been infected by an unfaithful partner. But then some people think that you can only get AIDS in Africa...
Get ready for Hell...
If you think that this is hard NOW; wait until it happens the second time.
You'd think this would give you at least a taste...but you have NO idea what you are in for if you trust again. This only has to happen a SINGLE time, and the entire paradigm of the relationship...