Woman's issues

Maybe tmi but
2 weeks ago I used a branded period pant for that week ( 5 days)

Probably towards the last few days I noticed I was itchy.

Looking closer little red bumps appeared but all down the outside is red , hot and itchy . There's no discharge or smell associated with BV or Thrush and I have had all the over counter thrust treatments and nothing seems to be working

Anyone had any other experiences like this?

Bumps don't appear to have any fluid or 'heads ' on them