Twins??

Maria
Hi ladies! How early were you when you found out you were having twins? My family think I'm having twins cause I took a hpt Thursday last week and it was a positve, took 2 more both came out bfp's and according to Glow I'm only 2 weeks 2 days today. My HCG level's 308. Started ttc just beginning of Jan. What are your thoughts? Just a bit confused.