Perfect triangle bites or rash?

Marli • Lottie Mae norm 3-23-20. Liam Thomas🌈 born 4-7-17. Angel baby 5-4-16. Hubby & I married 11-1-14. Have two Pomeranian `babies`.
This is right between my boobs. I think I have a yeast infection between them. I had it before when they were huge. 
The white lines are scars from my breast reduction 4 years ago. I am 10 weeks pregnant and do itch all over with allergies and stuff. 
We did come back from Vacation Sunday night. I don't think there were beg bugs there. But I don't guess I can be 100% sure.  It I didn't notice them until tonight. So it seems a little late to come up. And I'm sure they're not in my bed...
Any suggestion on what itcould be? Or what I could do for it?