Some gyno issues bothering me

It has been bothering me for almost two years.
Whenever I'm starting to get aroused, and the lube is supposed to come out, it starts to hurt near the entrance of vagina. If I touch it, I can feel small small firm bumps there. But I still get wet after a while, and those bumps disappear completley after I orgasm. I've continuously told my gyno about it, and said that it's totally fine and I shouldn't do anything about it, she said that it's cleaning itself out.
But it's not normal, is it?

It doesn't happen all the time, but like each second time, I think. Has anything like that happened to you?

Is it that your body is struggling with producing it's own natural lubrication? Perhaps using a synthetic one could help?

Ask your gyno to check your Bartholin gland. Its the gland/duct that produces lubrication and if it becomes infected or blocked it can erupt into bumps.
I've had an infection in mine and it produced a little bump where the blockage was. It cleared up on its own, but sometimes they need antibiotics.
Good luck!