Hopeless feelings

Hey there. Just wondering if anyone has experienced strong hopeless feelings. I know depression can come with OCD but I don’t generally feel depressed. I’ve always been a pretty optimistic person and while I have really been struggling with OCD lately I can’t tell if these feelings are related or not. I’ll have a good day like today and suddenly when I’m watching tv or reading something I’ll get a strong feeling of hopelessness like what’s the point of anything? These feelings are strong and scare me and I think I’ve developed a fear of depression or snapping. I avoid things related to harming myself and the thought really scares me. I don’t walk around sad or have any other symptoms of depression only these sporadic moments of hopelessness.