Regular bumps on one side of the body.

I have been experiencing some blisters/bumps (bright red) on only one side of my body, right leg. It started with below my knee and then moved upwards to lower thigh and then now it's on my upper thigh between legs portion, as if they are moving up the leg each time. 3 episodes of breakout have happened so far. These blisters/rashes come and go on their own every 15-20 days and itch a lot.  I also suffered from urticaria as a child, but these bumps leave spots afterwards each time. I have been feeling very uncomfortable due to these, my sister has non STD herpes labialis for many years now, but I didn't meet her for atleast a few months before I started getting these. Should I get tested for HSV 1/2 to get more conclusive evidence...