Low pulse level after Covid recovery.

Hi doctors, My father (64 years) who has high BP has recovered from Covid 2.5 months ago. He had been hospitalized for a week of treatment and has been discharged after 11 days. He had been taking Bronac 600,Astymin Forte for 2 months and discontinued recently as per Dr's advice. He was also taking Ecosprin 75(as his d dimer was high) for nearly 2 months and only discontinued as per Dr's advice. He is still taking Nintedanib 150 and has been prescribed to take the same for 1 more month. After he started taking Ecosprin, his resting pulse level would go down from 75-80 to 60-70 and sometimes even 55-60 range. As mentioned, he discontinued the same 4 days ago and his resting pulse rate is still low in 57-65 range. His BP is normal (80/130) at day but at night it goes up(88/157). He claims he's fine, does not feel dizzy but is tired at times. Is this not a concern or should I take him to a Cardiologist to do ECG/Echo? Is it normal for BP to be high while pulse is still low at night time?