Small red bumps on body. Right now?

I'm observing red dots on my stomach hands and legs since 2 weeks. They are red tiny bumps which are mostly turning black and flat in 3-4 days. Very few are withstanding for a week and turning into little blister and becoming normal. I'm using leavocitrizine once a night since 5 days. I'm in contact with a family member with a history of severe itching since 25 days. I also had a contact with a family member who had similar skin allergy. After a week of first appearance of symptoms , new bumps stopped appearing and when I thought it's getting normal I'm seeing new red dots today. I have no fever or flu like symptoms. I'm in a village and I might need a week more to reach an expert. What can be the best medicine helpful for my condition right now ?