Hello Doctor, Good Morning. I Just Wanna Ask, Cause I

Hello doctor, good morning. I just wanna ask, cause I was worried that I am pregnant then I take 2 pregnancy test 1is positive and the digital is negative.I was delay for my monthly period for 2 days, then yesterday I was having terrible cramps in my back in my pelvic then today doctor, my mp is so heavy then, I noticed a tissue come out far be I look it's not blood is it a tissue? doctor, I'm I having early miss caring I am very much worried and 1 am afraid dnt know, Pls help me. Thank you