Panic attacks?

Ok, so.. This happened to me when I was pregnant before, and it just kinda happened again. I don't think its normal, but I'm not sure what it is, and google is no help. Last time I was pregnant, my husband fingered me in the shower. I had a couple of really intense orgasms, and then it kinda went black. I just remember that suddenly I felt like I couldn't breathe, and I was literally sobbing, and my husband had to help me to sit on the floor of the shower and coach me through breathing. It passed after a few minutes. After that, we didn't do it in the shower, because we thought I might have gotten too hot or something. Fast forward to now, I'm pregnant again after my miscarriage. We didn't think about it, and he fingered me in the shower again. We turned the water on cold, and he did it slow. As sook as I came, I started feeling like my heart was racing, and I started crying without reason. I feel like if we would have continued, it would have been the same as last time. Has anyone experienced this? Any advice? Should I mention it to my dr? I'm only about 6 weeks now.