Please help me

I have no insurance or money at the moment. I haven’t had my period in over a month, have had slightly bad/dulling cramps for the last few days, no spotting and took pregnancy tests that came out negative. I have tried to drink an herbal tea to stimulate the uterus and nothing has happened. I’m kinda starting to get a lil scared. My period has skipped a month before a few times. Just never this long.