Should I obtain legal advice if I received a "courtesy call" from police on the "possible charge" of harassment in response to an ex's claim?

My ex misread signals during our last encounter and sexually assaulted me. I never consented to what was done to me and coerced to receive oral sex. The next day I went to a clinic with flu like symptoms to get checked for suspected coronavirus and broke down about the reality of what was done to me sexually. I was then given extensive STD tests. I was upset and reached out to my ex several times asking how he could have done what he did knowing I did not want sex under those circumstances and requesting medical payment for the STD tests. None of the requests were threatening and I indicated I had no interest in reporting it. He had the chief of police from his borough contact me as a "courtesy call" to not contact him. He said it could become a harassment case. I explained my side of the story and he said I'd have to go to the authorities where the incident happened. He said nothing was filed and brushed it off. I don't know if they are doing something behind the scenes. Please advise