No you did not do this. I will give you an example of blasphemy against the Holy Spirit. First, rule number 1, you can’t commit this sin by accident so if you aren’t sure, then you didn’t do it.
Example: Jesus appears to you completely, and bodily (like Faustina saw and how Padre Pio saw the devil, this type of bodily seeing). Jesus tells you He loves you and He wants you to go to confession to repent your sins. You have now seen the ultimate and infinite mercies of Jesus. You decide you don’t want to go to confession because it isn’t a sin. Thus you have openly rejected Jesus and claimed sin and the devil for yourself.
Keep in mind Jesus doesn’t appear to us everyday, this never really happens. Seeing Jesus in a dream can be doubted it was just imagination. So we need concrete evidence, like when Jesus in the Bible casted out demons and healed the sick and was raised from the dead, AND THEN Chief priests still thought he worked these miracles because He was evil and had the power of the devil - bam this is sinning against the Holy Spirit.
In our life, really this sin comes into play at judgment day when Jesus reveals Himself totally to us. Do we prostrate ourselves and beg for mercy or do we claim sin as our own?
Speak with a Priest about this if you want but again this sin can’t be done by accident so since you aren’t sure you BY DEFINITION didn’t do it