Hi Sir I Will Be Glad If You Could Help

Hi sir i will be glad if you could help me out with this , for the first time I have missed my periods for this month I have even took a pregnancy test two days before in evening it was negative , not having any pregnancy symptoms else stomach cramps for the first time and a bit feeling like vomitting or not having anything other than this I am feeling bloated on stomach with a faint line running from my pelvic toward belly with more stretch marks there is even ore amount of discharge from cervical please help me out with this as I never had a periods problem before ever with 21 days of cycle my last period date was 27th jan 2016 please help me out with this I am very tensed for missing my periods.