worried :/

I was watching tv in my room and all of a sudden I noticed a change in my vision. My right eye vision was blurry, I could see a halo on anything bright; lightbulb, tv, computer monitor, etc.

I kept blinking and rubbing my eye thinking it would go away but it hasn't. Previous to this I had noticed alot more spots on this same eye, I think they call them "floaters" and sometimes when I'm taking a shower I'd see tiny yellow lines going in every direction for a few seconds.

I had told the doctor about these previous symptoms and he said it was probably due to migranes, I insisted I wanted to get checked so he referred me to a neurologist who diagnosed me with migranes (which I've never had before pregnancy). He just checked my reflexes, heartbeat, and eyes, could this be enough to make such a diagnosis???

Could these visual changes be part of pregnancy?

This blurry vision thing is making me worry though, I've never had this before! and I'm getting a little anxious not being able to see clearly with my eye! :/