I keep having this feeling like my heart is suffocating and i kinda feel out of breath, could it be my asthma acting up ? it happens when laying down

Needs evaluation: Given your young age, and gender, the most common explanation would be your asthma or anxiety; however, those symptoms can also suggest more serious conditions that should be evaluated further by your primary physician. He may want to do an echocardiogram (ultrasound of the heart). Call 911 if shortness of breath worsens, dizziness, passing out or chest pain.