Blood pressure related. Investigation?

Hi, Today morning on bed I was feeling bit weak and dizziness with cold. My temperature shows 97.1F ,SPO2-99% , Pulse - 80-90. But my BP shows lying on bed 94/51. At noon in sitting position I measured my BP after breakfast 106/64 -Spo2-97,Pulse-85, After 2 hrs of lunch when I came on bed dat time BP is agn 94/51 while lying on bed and sitting on bed 103/63. Cold and snizzing is there. One year bck I was gone through angiography where report says Minor LAD and Minor plaque build in mid. I was only given BP tablet and cholesterol tablet for few months which I continued and also loose my weight from 108kgs to 85kgs and stopped smoke and drinking. One month back I have done Lipid tests, CBC, ECHO (65% LVEF), haltering for24 hrs, CPK, cpk-mb, HsCRP, glucose, thyroid,vit B12,Vit D, al reports r normal . somehow doctor told me to continue one new tablet Concor Cor2.5, Now m worried abt my BP. Should I go for further investigation ? As now m feeling bit weak and bit dizziness with cold.