Heart malfunctioning while beating.

(This is not anxiety) This has happened to me twice before i have had pvcs from months now but now i have started getting something different and i can't describe it properly but i will try.It feels like a catch in chest on one specific spot where my heart is and as i could feel my heart beating(i am thin)i can clearly feel my heart beating completely irregularly its not fast its really slow and heart beats the opposite way sometimes while that happens,I can clearly give it a title "Malfunction" it just beats irregularly not fast but slow and feels like its getting spasms or it beats the opposite way sometimes lasts for min 10 secs max 20 secs. Its not fluttering by the way(like vtach although i get fast HR right after it but its because i got scared by it) neither a run of pvcs(i can just describe it as my heart malfunctioning).Had all tests came back normal 3 months ago had no symptoms while that happened either.