miscarriage or normal?!

Chloe • 2 angel babies 😇 😇 ❤️ 1 baby on the way 👶 💕
4 weeks pregnant, started lightly spotting last night, and it's spotted now and again until now... it's only really when I push it out.. I don't need a pad.
I also had a tiny clot the size of a 10p  piece. I feel fine within myself.
Is this normal?
A&e tried telling me it's "probably a miscarriage" and sent me away without any tests etc!!!!
I haven't any cramps etc, just spotting and one small clot first thing when I woke up. 
Is this normal 3-4 weeks in???? I have pcos!!