i sometimes get a slight pressure weird sensation on my back on occasions, and i believe it is my mam in the spirit world trying to let me know she is around me. I have only experienced this scince she left this earth plane, and i also get tickling sensations on the top of my head, again this has only happened scince my mam has passed.
So it could be a possibility that it is your guide or a passed loved one.
I hope this helps, and i hope experienced others on here can give you better feedback.
Love Golden Angel