Im freaking out. Should i be worried?

Veronica

So Im 5 weeks 3 days according to my app. i had very light pinkish and brownish spotting on and off for 3 days. I have a weird cramp/twingy feeling on my right side of pelvis. I went to ER and gestational sac was there but they said it was too early too see an embryo or anything else. My hcg level was 4311. Should I be worried?