Consider speaking to a qualified sex therapist. I have seen one in the past after a sexual injury and sorted me out and never had any recurrence. Never would have thought to do what the Dr set up, probably would have just continued to suffer longer if I hadnt gone, lucky I had the motivation because I met a new lady at the time that I really liked but aftereffects of the injury we still present(sadly my previous relationship never recovered after the "incident"). It is awkward having that first conversation but I just told myself they've heard it a million times. Your current experience sounds fairly severe in terms of its impact on you if its waking you, that's a reasonable point to seek professional help. Especially if it is also having a negative impact on you in other areas.
OK thank you for your help