What’s happening I thought I was pregnant?!

SOMEONE, ANYONE HELP!

“Period” 8 days early brownish/nothing but I really thought I was pregnant. I had symptoms such as:

• Tired - like overly tired it gets to 9 o clock and I’m falling asleep!

• Frequent urination

• Cramps

• Back ache

• Sore boobs and nipples

• Heart burn

• Metal/blood taste in mouth occasionally (don’t know if that means anything?)

These symptoms have been going on now for about 3 weeks. My last period ended 15 days ago so AF isn’t even due yet. This happened last month also (meaning 8 days early and Just brownish discharge for 7 days) someone please help!