Skin problem n severe pain since 7 days.

Hello Doctor, I am having a severe pain with the allergy on my back and on my breast.. I have a 1.5 year ild daughter who is breastfeeding..i am applying betadine and savlon along with candid powder on this.. Initially it was a pink patch but now from two days it has become like this as shown in the pictures attached.. First picture is of my back and 2nd is of my breast. I am not able to feed my daughter and not able to wear bra..and also not able to sleep. Please advise what it is? An insect bite or is it something else.. Should i apply betadine and candid powder? This area is very painful. Its been a week i am facing this issue.. Please advise in this regard.. What should i do to heal it and get relief from this. Thank you in advance. Regards, Shilpi Gupta