Pain!

Warshana

For some reason today I been in so much pain. On and off light cramping right above my vaginal area and my thighs feel so sore. I am currently 5w3d. Am I the only one should I be worried? Fast forward I went to get a sonogram at 5 weeks they didn't see a sac or anything. I came back 48 hours later and my beta has doubled. I have an appointment coming up to re due my blood work along with a sono. Should this pain worry me?