Irregular periods. Taking some tests.

I have been suffering with irregular periods and rapid weight gain since the last year.A year before that i had taken some medication to delay my periods for almost a month.the medicine was crina ncr-10mg.since then i am suffering with this problem.i have seen my gynaecologist and she recommended taking birth control pills like regestrone to regularize the periods.But i did not take it instead I am taking M2-tone which is an ayurvedic tonic.From the last couple of months my periods have been regular.And i have started a weight loss program as well which has helped me lose 5-6 kgs in 1.5 month.But in this month i got my periods twice i.e. on 9th feb and then on 26th feb.Is it normal or should i consider taking some tests.