5 weeks pregnant and bleeding

Hi I think I'm loosing my baby.. 
I have been bleeding for almost 24 hours.. Firstly it started small pinky brownish when I wiped.. I have roughly 30 mins of mild cramping and pain in my lower back..
I spoke with my doctor who told me.. At this stage it's to early to tell we need to wait it out.. 
Since then the bleeding has got slightly worse and I've been passing very small clots tonight I had rather large one. 
I've been in no pain since earlier today.. 
I'm calling my doctor again first thing to update on the changes but I wondered if anyone had any advice or insight on what to expect... 
This is my first pregnancy.. I found out less than a week ago. 
I just want clear honesty on what to expect or if anyone has a story that can help me understand what is happening. 
Thanks ❤️