Seeing blue spots/ flashes & spots in vision!!! Help 36 weeks!!

For a few weeks now I have been seeing little flashes of spots. They are very small and are as if you looked into a light, but they go away in a few seconds literally!

Sometimes they are blue, white, or black.

It’s really scaring me and I read somewhere that flashes of different colored lights where signs of a brain tumor...... someone please help ease my mind...

My BP is always normal and blood work was normal. I haven’t heard about my 24hour urine collection I did on Thursday, but I haven’t been told of any protein in my urine so far either. (Unless they call me about my 24 hour urine collection Monday, tomorrow)