Just because this is a reply offered by an Apologist, does not mean that it is correct. It could be correct. It mostlikely is correct but without supporting Church references, we can not be completely certain that it it correct. That is something to keep in mind. I would recommend the following:
- Do as you said and bring this up at your next confession. Hopefully it will be with a priest that uses the correct words and mention to him that at your previous confession the priest did not use the words of absolution that you normally hear and merely said that he forgave you and you were wondering if that was a valid confession or not and let him take it from there.
- Secondly, I would RECOMMEND that you do not receive the Eucharist until this matter is cleared up one way or the other. Remember, that in the Eucharist, we invite our God, to Whom sin is greatly offensive, to enter into our soul. If we truly love Jesus, we would not invite Him to come into a place that was filled with sin that was offensive to Him.
The best example that I can give is if there was a possibility that you were highly contagious with something, you would not want to come in contact with a loved one until you were sure that it was safe.
The same logic applies here. If there is a possibility that we might be in a state of sin, we do not want to expose our Lord to something that is offensive to Him.
… This is merely my OPINION. You are obviously free to do whatever you think is right. Additionally, I am sure that there are folks who will disagree with this and that is fine. They are also entitled to their OPINION.