Need advice on my condition. Bend)

I returned from UK in July with no medical condition apart from sinus problem(used to bother me sometimes in cold). After 14 day quarantine, Day1 when I returned I faced a chronic breathing problem in the night for which doctor gave me montair lc, alprex and wyselone as an immediate measure. then had a checkup with another doctor who conducted chest xray, pft (which were ok) & blood test where I had only 9.3 hb so he gave me hemoshine and exzilor. While exzilor i took for 6 weeks & then cut down to thrice a week, twice a week & zero, Hemoshine I am still taking. now from around september, I am feeling a pain/soreness at an area at the back right side of my head. Sometimes it stays for days & then goes on own. Sometimes I also feel neck pain there. Now this headache is becoming more frequent & I also feel restlessness sometimes which feels like irregular heartbeat, heartburn and am also getting sternum pain from 4 days at night. got ecg (its ok) & neck xray done (slight posture bend)