Retroactive Jealousy

[Karl Rand]

Yes, jealousy often is a perfectly natural reaction but when you say "The more we discussed it the more I started to feel insecure about myself. My partner constantly reassures me about all my fears. Because of this I feel guilty having this reaction. I want the feelings to just go away but I know that will require work and a lot of it on my part. I just don’t fully know where to start or why I feel this way so suddenly.”  I’m left wondering what you mean by ‘will require work and a lot of it on my part” Reminds me of a saying  - - -  (author’s name forgotten) Endless orgies of self analysis can be counterproductive. That may sound trite but I think what I’m leading up to the suggestion if your problem persists in other romantic situations and you feel overpowered by them professional help is the way to go. Easier said than done for an Australian such as myself who has access to 10 free consultations a year under our national health scheme.
But there’s another way of looking at this, most of us have been rendered jealous and/or irrational when falling in love.
As others have said here , often jealousy is a perfectly normal reaction. It’s when such reactions start to destroy relationships alarm bells should start ringing.