almost 8 weeks and only smiled twice

i saw her smile for the 1st time 3-4 days ago. where i thought it was real when she woke up in the morning. the second time was a day later at her dad right before drifting to sleep. im getting very worried as she'll l be 8 weeks in 3 days and doesn't make eye contact alot either. She does track things, including me. Anyone else delt with late smiler? I'm extremely worried with anxiety