black stool?

hello! my baby turns 6 months in 2 days. EBF, we started purées a couple of weeks ago, so far she loves it! she’s had a couple darker poos before but they were more liquidy, doctor said normal when starting food. but she just had a solid one, pretty dark color basically black with a few spots of brown. i’ve had a bleeding nipple from thrush(ouch) and she’s had a good amount of bananas the past few days. could this have caused it to look like this? is she just constipated and have blood from me in it? called and left a message at her doctor but it’s sunday, just need some peace of mind!