I know how you feel.
Although I have always had dogs, I have never had a puppy so I have never house trained a dog before.
We got Poppy at 6 weeks old and I started training her on pee pads with tips I had read here on YT.
She caught on quickly and I would say by 2 months old she was 100 percent pad trained, we would leave the pad at the back door and she would go to it all by herself.
Every time she went on the pad she would get lots of praise (no treats at that time).
Once she turned 4 months she started to ignore the pads and was going all over the living room, my parents were getting frustrated and said if she isnt trained soon she will have to go.
(I dont think they were serious, just talking out of frustration but its still upsetting).
So I really cracked down with the training.
I put her in her crate at night and when im not home and she has never once messed in the crate.
The crate is just big enough for her bed, I put a few chew toys in there and have her water bottle attached to the side.
We go potty first thing before and after crate time and she goes outside for potty every hour (sometimes more if she is restless or sniffing the floor).
Now everytime she goes outside she gets lots of praise and a treat, she hasnt had an accident in the house for a few days now so things are going well so far.
She will now stare at me and when I ask if she wants 'pee pee' she will run to the back door.
I know its upsetting but now you have to train her to keep her, so put in all your effort.
Treats are the way to go!