Menstual problems!!!!!!need help!!!!!

Patient: This month i was around 2 weeks late on my period. when it finally came, it was very light red and only a spot. so like normal i got a tampon. then later, i went to change it and there was nothing. so i went without a tampon until the next day when i spotted again but it lasted the rest of the day or the next 7 to 8 hours or so. then way way late in the night, i took it out to take a shower. after i took it i put one back in. in the morning…nothing. i had to go somewhere that i had to wear light pants. i had no pads and no money for any so i put another tampon in thinking it would start back up again. again nothing later that day. it was dry and hurt because of how dry it was. that was 4 days ago. also im really tired. i havent been eating much and i have been really thirsty.what do you think is going on. i am 25 now, ive been with my husband for 8 years…nothing has ever happened no pregnancy. we havent ever used protection. also we have been off and on heroin addicts for 8 years. recently clean again. i have had skipped periods, ones that lasted for weeks, but never like this and those were mostly when i was a teenager. the worst thing that happens now is that once in a while its a week or so late. i dont know whats going on. please help me

Doctor: