Don’t feel right

Sa

Hey girls, so since yesterday I’ve had some nauseousness return and just haven’t quite felt well. Also these past 2 days baby girl has been moving way more than usual (thinking that’s probably not a big concern though). Anyways, just about 20 mins ago I was getting ready for bed and was just about to take my weekly bump photo (34 weeks today) and out of nowhere got extremely light headed and my legs gave out on me and I just sat my butt right on the floor and had to sit against the wall. I sat there for awhile and now anytime I stand up I feel like I’m gonna pass out. Only other weird symptoms I have besides this and the nausea is dark urine that I’ve had for about 2 weeks now. (I had the urine checked for uti at last appointment and they didn’t see anything and just told me drink more water which I am) I have an appointment tomorrow morning anyways but just wondering if anyone has any ideas of what could be going on. Just makes me nervous as this is the first time I’ve experienced lightheaded/dizziness.