When does it stop 😫

I’m 14 weeks today, and recently started having bouts of being out of breath right on cue with when my app said i might. But it’s very frequent lately, and on top of it, i’m frequently feeling very weak, lightheaded, seeing stars sometimes, etc. Nausea sometimes comes with it. If i have to reach for anything above my head, it’s pretty much game over for the next hour. The only thing that seems to help at all is laying down, which i cant do at work several times a day. I’m drinking water and snacking often, and my husband is buying me a shower chair this weekend because i can rarely make it through a shower without having to sit and take a break. This is my first pregnancy, and i know these are fairly common symptoms but i dont know what extent/severity is normal. I have an appointment next friday and i plan to bring it up then, but does anybody have any tips to get through this easier ? My job involves a decent amount of time on my feet so this has been very frustrating and difficult 😣