Need some advice

18 MALE. So I’ve recovered from mono, first got it 3 months ago and the acute stage was about 1 month. However, I’ve been experiencing tiredness and head tension which is stopping me from doing the stuff I normally would do, work, college, gym etc. The head tension is the worst symptom and varies throughout the day. The rest of my body feels completely fine. I also noticed that I’m hyper aware of every pulse in my body and when I touch them they feel “strong” but I am a massive hypochondriac. I had a blood test the other week for mono but it came back “normal” which confused me. I thought even if I wasn’t infectious anymore it would still say I had EBV? Have I never had mono? Also, I am on the fence as to wether I have CFS or not. Earlier this week, I forced myself to go to the gym. I was then worried the next few days that I’d get PEM, but it never happened. So what the hell is going on? Will this go away? Maybe it’s also worth mentioning I have untreated stage 2 hypertension.