5 weeks post Op. New significant colour changes to breast

Hi i am travelling in the USA and feel disconnected from my medical team. For  some reason i was not put into contact with a BC  nurse. I have one incision just under the armpit where cancer and lymph nodes were removed. Until about 5 days ago i had a small amount of bruising and discoloration at the incision site  but now the majority of my lower breast including the nipple is yellow and red. I have large breasts so this is quite significant. I was diagnosed one day and had the lumpectomy surgery the next and so i am in a catch up situation in knowing what to expect. All other pain seems to be what i have read as normal. I don't  have more tiredness than before and there seems to be no unusual heat with the discolouration. I have been on my post menapausal hormone treatment for nearly 4 weeks now.

Any advise would be greatly appreciated. As i don't want to seek medical help....very expensive...... if this is just delayed bruising etc. April