Almost 6 weeks pregnant light brown spotting then clots is this a miscarriage?

Charlotte

Yesterday was the first day I spoke to the midwife giving all my details etc. Last night I started cramping really bad. I felt like I was about to get my period. I went to the bathroom and had watery brown spotting which started to go slightly darker and then I passed this clot and things went back to light brown watery spotting again. The cramps were intense.

Do you think I'm having a miscarriage? :(