Ive been having this dry cough for three months now. it gets a bit worse in the morning when i workout with some phlegm and in the evening when i lye?

Chronic cough: If a cough persists more than 8 weeks then it’s considered chronic and you need to be evaluated by ENT to make sure it’s not coming from post nasal drip, silent reflux, and if necessary by pulmonologist.

? GERD: Reflux can cause such symptoms, especially if you have already sensitive airways, you can can try OTC antacid / PPI, but read the labels carefully, and consult your doctor for more comprehensive evaluation, you may need a bronchodilator before exercise, good luck