Aja,
This has happened to me sometimes with Paraliminals, or for that matter, often when trying to make a positive change. I think it is just my dark side (ego, maybe) trying to maintain the old status quo.
The negative self-talk/chatter was one of the easier things to eliminate. Eventually I started to catch it, and then rephrase the statement to something positive. So if I heard myself saying,as you did, "you're so stupid, no one likes, etc" I'd rephrase, saying, "I am brilliant, everyone I know likes me, etc."
Although it felt silly at first, and some of the statements were a bit far fetched,it did work quite well.
Resistance is still very active at times for me, but it's just not as powerful. It may have gotten sneakier, but I have good tools now and I can recognize my resistance soon enough to turn things around and let my higher self prevail.
The Paraliminals do work. Sometimes a different order of use will help. There was another reply to that effect.
Treat yourself with kindness.