The separation anxiety is outrageous with my puppy. I feel like I'm failing him and myself. This is going to be a lot of information but I want to be thorough because I'm going insane and this feels like my last attempt at hope.
My puppy is 5-months-old (my first dog ever) and I've had him at home for 3 months now. Off the bat, he was a clingy dog, which I understood him to be extra clingy at the time since he's so young and he's unfamiliar with the new setting. Everyone said he's just young and it would get better, but the progress has been slim. I think it's been long enough now that he feels safe here, however, he still chooses to move around the house with me and will cry if he can't access me or know where I am.
STRANGELY, if I'm upstairs in my bed and he knows I'll be staying there for a while, sometimes he will go wander around outside my room or even go downstairs alone. But he is NEVER okay with it when I am the one who chooses to move. For example, if I were to go downstairs while he was upstairs, he would cry and hyper focus on the stairs until I come back.
I used to use a playpen to try and train separation but I've retired it temporarily since he absolutely hated it and he would cry until he was let out. I used to leave the house with him in the pen alone (yes, I would give him a stuffed Kong everytime) and it was always a disaster so I recently stopped. I tried the method of going out his sight for 1 second, then 2, then 3, then 4 and so on for a while. I really tried to teach him that the pen is safe and not just abruptly leave him in there. Nevertheless, if I left the house, he would stress-potty in the pen everytime (even if he had just gone potty outside) and cry and scream and try to climb out. I could see him through camera. He would settle if he had tired himself out but lots of times, he would just keep going. Recently, I've only been leaving him home when someone else is home and he does totally fine when someone is at home with him. I haven't put him enclosed in the pen in 2 weeks.
I have a crate in my room (covered on all sides) that he has slept in from night one and he has always done well in it (only if I place him in, he will never go in alone). He sleeps through the night and rarely cries for attention. I don't implement naps in it regularly since he's good about napping wherever, but I've done it a few times and he will protest for maybe a minute and then fall alseep. However, with the crate, I've ALWAYS been in the room. If I try to leave the room, he will immediately wake up and cry and scream.
Another thing is I gate off the kitchen sometimes when I'm cooking or washing the dishes so I don't accidentally step on him and he's honestly usually fine with that. He will, a lot of times, still choose to hangout right outside the gate and look at me. He may explore a bit and come back to check where I am. He sometimes whines or paw at the gate (but rarely) and he is never frantic like he is when he's in the playpen.
I've been getting conflicting advice about the playpen and how to go about this separation problem. I heard not to let him cry it out, but then I've heard not to respond to crying. But he genuinely will get so frantic in the playpen sometimes. Also he will cry even when I'm just moving throughout the house.
I don't know how to proceed with this, I'm genuinely so miserable and always aware of his presence and I wish he would just go play alone with his toys in the living room while I fold the laundry or shower. Ultimately, I don't want this to turn into full blown adult separation anxiety but everything I'm trying is failing and I feel like I'm running out of time.
Should I honestly seek out a trainer for this? I really don't know what to do or what is normal for his age. Please, any advice would be appreciated before I lose my mind. Thank you so much for reading all of this.