should i be worried?

I’m anemic and i’ve struggled when i’m on my period (which has been irregular since I first started). sometimes when i’m standing, I get light headed as hell and my vision goes away, like I see it get blurrier and blurrier. it didn’t happen much

now i’m 13 weeks and it’s happened twice in less than 2 weeks, we’d be at a walmart and i’d suddenly feel weak and it get worst within minutes and then the last few seconds my vision starts going away and I feel super heavy and then the nausea comes and i throw up.

is this normal? from walking around walmart too much or should i bring it up with my doctor