I'm scared shitless

Katie🐢 • Single momma of a beautiful baby boy 💙 09.29.16
My HCG levels on Monday were 309 Wednesday 590 and my doctor just called me saying it only went up to a little over 700 on Friday. They should have been close to 1000. I have to wait until Monday to get blood work again. I am a nervous wreck and now have to wait all weekend. Anyone else experience something like this? 
I'm so scared I'm going to MC