Thanks for elaborating. That sheds a lot of light on the situation, at least to me. I was such a horrible sinner when I was young, of the alley cat variety, so trust me, when I even thought about becoming Catholic, as I did for years and years, something would sometimes happen to discourage me. The nature of what happened eventually told me that I was on the right path, not the wrong one. The vast majority of converts I am sure, never experience this type of thing, but I did.
I even had some weirdness start up when a decided on a formal date to consecrate myself to our Lord through his Mother, using the Saint Louis De Montfort method. Nothing major mind you. Satan does not want someone who is firmly in his pocket, or at least heading that way to leave his fold, so he will do what he can, or rather, what he might be allowed to do, to deter that. If that action is harmful to your spiritual growth in the long run, chances are great that he will not allow it. If however, good may come out of it, I would say the chances are much better God will allow it.
Free will is a part of the formula as always. We have the freedom to make it worse if we wish rather than doing the right thing. I guess I have experienced these things either due to the type of sins I committed, or I am just that thickheaded, that I need stronger reminders of what the stakes really are than most people! [most likely the case!]