After reading your history it appears that you developed simple sebaceous cysts. This is common problem and we see so many of cases in normal population. So do not worry about it. You can apply gentamycin
cream over the affected area. Stay away from hot and humid climate and wear cotton clothes. Do not try to pinch or pop the area as can get secondarily infected. This can be very simply excised in few minutes so can meet your family physician for the same.