Rash on C-Section Scar..?

Any ideas on what the rash could be caused by? I had a c-section a year ago on May 14th 2019. Now I am 14 weeks & 2 days pregnant now with baby #2. All of a sudden I have this super red rash along my c-section scar. It’s really burning me right now, and every time I feel it the rash has a foul smelling odor. I don’t know what to do because it hurts so bad I don’t even want to touch it.

(P.s I do apologize if I offend anyone with my picture. I tried to blur out as much as I could.)