Should I Be Concerned About A Skinny And Curved Gestational Sac Seen On My Vaginal Ultrasound At 4 Weeks Of Pregnancy?

I am 21 years old I just had a miscarriage in January. I recently found out I was pregnant and went in for a vaginally sonogram. I am 4 weeks and 3 days pregnant but I an very concerned by how my gestational sac looks. It is very skinny and curved a bit should I worry before my next appointment?