is this miscarriage? if yes what to do next ?

Looks like a miscarriage. I experienced this too. Was 6 weeks preg (based on my own calculations) and after tested positive with pregnancy test kit. Supposed to see gynae that week but one morning, I felt a blood clot gushed out when I peed. Looked into toilet bowl and to my horror it was covered with blood and some clots similar to this. Went KKH straightaway and they couldn't find anything in my womb. It was all cleared with nothing. But blood test came back 'positive' still. Heavy period for 8 days and the following month I was negative for pregnancy... It was tough for me. Stay strong.