hi i had my last period at feb 3, mar 19 i have got some spottings too. i have gone to doctor tested but its negatiuve inp reg test. suggested susten 300 for 5 days,and if you are not u will get mensus, if not,then youare pregnant they told, wat is susten use and purpose, pls explain about.? am having capability of carrying ? married about 10 months before only,expecting to be pregnant