Folks who have doubts about salvation with the Catholic Church, need to remember a few assurances.
One, Jesus promises us, anyone who eats His flesh or drinks His blood will have life everlasting. What does that mean ? simply that when we receive Holy Communion, and believe that it is indeed the transformed Body and Blood of Christ, our salvation is assured, we will have life everlasting.
Two, St.T John Vianny tells us, folks who always pray will most assuredly go to Heaven, whereas, folks who never pray will most probably go elsewhere.
So basically IF you receive communion regularly AND you pray every day, you should never have to worry about your salvation.
Folks who think Catholics have no chance to get to Heaven… well they are just complete idiots and need to look to their own salvation, because by condemning everyone in any faith just because they disagree with their own faith put themselves at risk.
Remember Jesus tells us judge not lest you be judged, and whatever measure you use to judge others, that will be use to judge you. That’s a pretty strong warning against just the type of thing that these protestant yahoos are doing.
Looking as this, few other faiths including many protestant denominations, do not believe that the Eucharist actually becomes the actual body and blood of Christ.
Anyone who suffers from constant guilt, a simple way to get around this is to just say a sincere act of contrition whenevr you think you have sinned seriously, and go to confession on a regular basis, say about once a month. anything more is probably excessive unless you really have a recurring problem. Then the priest will adcise you if more frequest confession would be helpful.