Spotting bleeding

Based on gestation calculation supposed to be 7wks, but encountered slight spotting and bleeding. Went for a scan but was dated 5wks++, can only see 3mm fetus no heartbeat. HCG on 2 days had slight increase but didn’t double. Also after the vaginal scan, bleeding becomes more, but still manageable using panty liner. But saw bloody jelly like substance this morning. Very worried, anybody had this issue?