Although blisters in and around the genital region should always be considered for herpes
, you have very clearly metioned a history of poor lubrication and rough sexual intercourse. This could very easily result in vaginal soreness and even blisters.
It would obviously be considered protocol to screen for herpes, but with the given history youe presentation is more likely to be due to the rough sexual act.
Please go ahead with the screening as this will get rid of your concerns and fears. And from next time onwards please make sure you are well lubricated. There are various safe and sterile lubricants available in the market.
Hope this helps.