Laying down at doctors or dentists gives me anxiety… could it be ptsd?

One thing was has always given me anxiety is laying down at a doctor visit. I went to the dentist yesterday and when the chair lowered for me lay back, there was just this sense of panic for a moment. For a second I stiffened and didn’t want to because I was scared, but I did after realizing I was safe and it was just the dentist. This isn’t the first time. I went to the ER and had to lie back so the doctor could put pressure just below my stomach, and I remember panicking and resisting when he tried to get me to lay down and feeling anxious when he touched me. Well I’m kinda wondering if this has something to do with past trauma…

(Trigger warning) When I was preteen I was sexually assaulted and nearly raped. During the attempted rape he kept me pushed between the end of the bed frame and him. I don’t remember if he tried to get me to lay down, but he did do everything to keep me there and I think I was somewhat forced to lean back as I was trying to put as much distance between us as I could. Ever since that happened, I haven’t dared engaged in physical intimacy. I just can’t. Being touched gives me anxiety and being kept from leaving a room makes me panic for a second. Well I get the same sense of panic when that happens at the doctor. I doubt it’s something that only happens at the doctor, it’s just the only time I’ve experienced it since because I avoid physical intimacy.

I opened up to a new doctor about what I went through and he asked if I maybe had PTSD because I was anxious about getting my first pap smear… I didn’t know how to answer. I’ve never been diagnosed, but I’ve never opened up about it before to a professional.