Any tips?

I am having a bad few days. I am 65 days NC, and for some reason I am obsessing again. I have the pit of despair in my stomach, and no appetite. I am trying to refocus my attention. I am obsessing because I am afraid he is happy, which I know is ridiculous and irrelevant. I am afraid the OW is better than me, also ridiculous and irrelevant. I guess I am obsessing again because I need to know for sure because I never got the full truth from him. Is this normal, to go through waves of wanting closure during recovery? I know I will never get it. I have to make my own closure, and I’m working hard on it… just these few days have been killing me. I am sick again with a bronchial infection, and I usually only get sick once a year. The stress has definitely taken a toll on me, and I know Ophelia posted about health as well, and I can relate to that. I think me being sick is a trigger because the last time I was back in December, was the first D & D, which I didn’t know about at the time, and was one of the most grueling emotionally, mentally and physical months of my life. Maybe being sick now, is just bringing back that awful pain I felt for the month I didn’t hear from him, I dunno. Are there any tricks or tips to stop these obsessive/intrusive thoughts?