I am 3 weeks into a new job. It's going quite well but I really miss my old workplace. The closing date for applications for my former post is on Friday. I am tempted to apply. But I'm old-school and feel that I should stick out the current job for longer. I'm not unhappy per se, it's just a feeling that I don't fit in quite so well and still feel rather uncomfortable. My new boss is amazing but I sometimes feel like a spare part. I'm sure the passage of time will help enormously. I just find it hard to sit with this feeling, and tend to hark back to the familiar. I applied for the new job because it was a promotion, but the same promotion will open up in the old workplace. Long story short, it really was just a case of bad timing.
My heart says 'old job' and my head says 'new job'. I also can't help but feel the move would be very embarrassing on both sides!
Have you ever been in this situation and what did you do? Old job feels like the easy way out, but like putting on your comfy slippers at the end of the day 
New job is the pair of Doc Marten's you really wanted and felt so good about getting, and even though the bisters are killing your feet, you know it will probably come good in the end.
Apologies for the weird footwear analogy 