*help* im worried

[munchy]

okay its like this. my bp has recently slowed down his eating due to winter im guessing but will still eat occasionally eat a mouse or small rat. i got him to eat a sub-adult mouse last night. that was the first time in a couple weeks i have been able to get him to eat. he is being kept at 90* on the hot side and about 80-82* on the cool side. humidity 50%. i dont know if any of that is relevant to my problem but i just wanted to provide some info.

so today i had him out of his enclosure for a while and he seemed completely normal, moving around and checkin things out like he always does when i have him out. after having him out for about 20 minutes i noticed something. when he would flick his tongue onto my skin, there would be little spots of red stuff which resembled blood. in fact, as much as i want to think it wasnt blood, im pretty sure it was.

does this mean it is time to go see a vet? is it possible that he maybe bit his tongue? has this happened to anyone else? what could it be? perhaps blood left over from a small feeding last night? the outside of his mouth appears fine. no cuts, scratches, or abrasions. the 'blood' is coming from inside the mouth. any help would be much appreciated.