Intrusive thoughts or truth

I keep having these images of myself having lesbian relations with random women. They come out of nowhere and freak me out. I try to push them away but I continue to engage and start analyzing any pornography I have ever watched, my choice of friends, any thoughts I have ever had during my life that could lead to me believe I am not straight. I have identified and been happy with being straight my whole life. Ive had gay friends since middle school and never identified with them but supported them in their journeys. This all started for me about 3 years ago when I graduated from college. I was struggling with depression and anxiety. My relationship began to struggle and my mind was a mess. I couldnt eat, sleep, or function on a daily basis. I finally got on proper medications but once in a while this theme comes back full circle, and when it does I cant feel any other way except that I could be in denial. The more I have these thoughts the more im scared that I actually like them and that my gut is trying to tell me something. I dont want to have any more of these thoughts but maybe im supposed to be listening to them. I feel like ive lost my damn mind. I cant even enjoy sex because thoughts will pop up or I'm so depressed that I have no energy. All I have ever wanted is to marry a man (my current bf of 7 yrs) and create a family together. It feels like that dream could now be lost. I dont know how much more I can take. I have no problems with people who are bisexual or gay. I just dont want that for me and never have. Im really at a point where I feel doomed.