itchy bumps on head

Hi mommys , so i have this itchy bumps on my head , watery rin sya like yellowish and habang tumatagal nagkakasmell na sya , some say it is normal due to pregnancy plus mainit ung panahon, have u experienced this ? help pls kung may alam kayo remedy before it gets worse , it started as a bump lang na parang kagat ng ipis now it becomes 3 , i don't know what to do :(