what happening?

Thanks for all your comments! Sadly instead of feeling happy and hopeful, right now i'm terrified that this pregnancy might be over. For the last few days i've had brownish pink spotting but last night it got worse. I woke up with the most painful cramps and have had bad cramps ever since and brighter red bleeding. I called the clinic and they said to come in tomorrow morning for another beta. Apparently my progesterone was quite low on Wednesday and that's why they upped my dose. I don't know what's happening. I'm scared and thinking the worse. I know that lots of people bleed in their early pregnancy but i'm in so pain, much worse that when I get AF.

At the moment i'm going out of my mind not knowing - at least tomorrow i'll know where we stand with it all.