Twins or fibroids?

I went into the obgyn at 5 weeks. The one with the arrow is my baby and the one with the ? Is possible a twin or a fibroids. This is my second pregnancy and the first one I never had fibroids. The doc ask me if I had two uterus, witch I replied I dont know. Than he said it might be a fibroids but we will know when I come back in 3 weeks. I and my husband has twin in the family. I also was taken <a href="https://glowing.com/glow-fertility-program">fertility treatment</a> the past two months before bc for those months I donated my eggs to help infertile couples. I wanna say it looks like twins yet im unsure. Please what do yal think?