22 Female, I'm not having my periods on time (monthly), but when I have it lately, I get too ached, my stomach gets ached too much for a week, I don't bleed 2,3 days after my period then after I bleed too much up to 1 week. Since I have not got checked up so far, I'm not sure what medicine to take. One my nurse friend recommended me "Meftal 500mg" medicine but I'm afraid to take it without prescription so plz advise if I can use that medicine or will I need to use anything else to cope away with my stomach pain temporarily?