I am seven months pregnant and I have red splotches on my stomach today I have noticed that I have red splotches on my stomach they do not itch but where the splotches are it is really hot. What should I do

That . That is concerning for a possible allergic reaction or vascular problem. At this stage of pregnancy, any complaint must be taken very seriously. Please call your gynecologist immediately for an evaluation. If you have itching, any shortness of breath, or other symptoms then you would need to be seen as an emergency.