Weight gain normal?!

Zo

In the beginning of my pregnancy I couldn’t gain any weight I lost 5 pounds actually! At my 21 week appointment they said I gained 4 pounds of the 5 I lost so I was 162lbs! I am now 23weeks and 2 days just weighed myself and I’m 170lbs!! Is this normal I am literally shocked in 2 weeks I gained 8 pounds😬 has this happened to anyone else just all the sudden gaining a bunch of weight😭 should I be concerned?!