I am married 28yr female trying for first child and always getting 8-10 days late periods with mensural cramps... but this time 6 days late with svere?

Many options: There are multiple options. Hormonal treatments such as birth control pills, Progesterone treatments and the Mirena (levonorgestrel) iud are effective reversible treatments that will help many people. There is also a drug called Lysteda that contains no hormones which will help others. If you are trying to get pregnant without success your doctor may want to do some other testing