Hi Kiri-ana,
I agree with Lisa please seek proper medical advice, A GP referral to a dermatologist and a breast surgeon would be highly beneficial for you. Hopefully it's a bacterial or viral problem that can be easily treated however it's best to keep seeking answers to protect your health. You know your body and obviously it's on your mind.
Please take heart in knowing many women have lots of different diagnoses and each outcome is completely different but it's proof with websites like this that if needed there is a huge amount of support and positivity available.
I had to fight to get answers as I was trying to nurse our newborn (6wks) baby girl and lots of highly regarded professionals kept putting my symptoms down to incorrect feeding, being hormonal, stress with a young family (my other daughters were 2 & 5). I did antibiotics, cortisone creams etc etc I was eventually diagnosed with Paget's disease of the nipple (via punch biopsy from a dermatologist ).
On the upside our youngest little angel is now 15 months old, I've had a bilateral mastectomy with tissue expanders and about to have reconstruction.
I'm doing great, my husband is extremely supportive and I have 3 beautiful happy girls.
What may seem at first worse case scenerio can also become intime all OK.
Good luck, stay positive, seek answers, keep questioning, follow your gut.
Warm regards, Kylie