I had a cold and my throat keeps hurting off and on all day but can get worse at night and in the mornings with earache. Acid reflux or cold?

Ear pain concerning. If you are congested, you may breathe through your mouth at night which makes sore throat worse. Although acid reflux can lead to some similar symptoms, it does not usually cause ear pain in this way. Recommend you see your doc so that an exam can be performed; treatment may be recommended, and the sooner the better.