Suggest Remedy For Delayed And Irregular Periods And Frequent Urination

Hello, i was wondering if i should worry that my period is never regular? I started getting my period in 6th grade... and my cycles have always been 35+ days. Never starting at the same time. For the past 6 months my cycle hadnt gone over 38 days with a consecutive 3 month pattern of 36 days most recently. It s now day 41 technically. Im 6 days late. And i had a negative home pregnancy test result. On day 40. Normally i do get cramps as a matter of fact, always. And i get bloated... but there is no sign of either. Is it possible that i am pregnant and my hcg levels are low? Should i test again? When should i test again? And also when i tested i didnt use first mornings urine. Does that matter? My body is always confusing. Im peeing more often and my cervical mucus tastes metallic. Does that mean anything? Please help me.