Dog Health Questions: Before a dog goes into heat for the first time, can they get spotting?

I have a five and a half month old standard poodle. The other day I found some scentless red spots on her bed and I assumed she had gone into heat for the first time. I put some puppy dog training diapers on her for that night and most of the next day but I haven't seen any more blood. That was 3 days ago and there are no more signs that she is in heat. I have no idea what else the red spots could have been. Can a female get spotting before, or in between going into heat? I do intend to get her fixed, but at the moment she is at college with me since I am in the process of training her as a service dog and we have no access to a vet until late May. Any ideas?

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Yes, they can spot. There usually isn't a break in between the spotting. I believe that she will go into heat soon but this was a false alarm.

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