Shaky and lightheaded

K
I'm 29+1 and lately I've been getting light headed and shaky some days. Today also just feeling unwell and have a headache (feels like a sinus headache and probably due to my sinus problems from before)
I have low blood pressure and also had low iron at the beginning of pregnancy but always take my prenatal religiously.
Anyone else feeling this way? I don't want to bother calling my doctor as I'm going in on Monday for my regular appointment.