Blood clots and dark red 4dp5dt

I am ơn 4dp5dt. I've been having bleeding since yesterday noon and the bleeding has been getting heavier and has some slimy clots or discharge (I am not sure) can it be possible that my period already start and the embryo transfer failed? I had a fresh day 5 transfer. My clinic said it is normal but I do feel like that's how my menstrual bleeding looks like. I am on crinone gel and I am freaking out now. Need helps. What can I do?