Cramping at 4W 5D but no blood?

Ca

hi ladies ! i’m pregnant with my second pregnancy but my first baby as i miscarried in April at 8 weeks last year. i keep tasting metal or blood in my mouth , i’m having minor cramps, front and back . and also might be tmi but i am having issues having a solid bowel movement and my b.m has a green colour to it ? please any help or advice would be greatly appreciated . i go tomorrow for blood work to find out my hcg levels to see if they have rised . i am 4 weeks and 5 days today .

please anything or any info . this mama is FREAKING OUT!