my period is ALWAYS HEAVY so much that a pantyliner, pad, or tampon is rarely enough

Ive also had the same types of symptoms. my period is ALWAYS HEAVY so much that a pantyliner, pad, or tampon is rarely enough. I have been spotting for roughly a week now, first 3days was brown discharge, 2 days of watery light red/pink when i wipe and now for 2days it has become a tad heavier (still not enough to wear a pantyliner for) on the most I've had a few drops spillage in the last 2 days but has only been when wiping, i took a test on Friday 10th and was neg, waiting for it to stop so that i can take another test. Ive never experienced this before.Besides that i have had extensive bloating, headaches, nausea, fatigue, food cravings, very sensitive belly, top of my belly right underneath my breasts is very hard, clothes fit tight and belly feels tight. i started getting tummy ache when i drink coffee with milk or powder milk so am now in black coffee, when i drink coffee now (black) i get a metal taste in my mouth.I'm so confused as to what is going on. Please help with any advice?