Talk to General Physician on Difficult Breathing, Chest Tightness

Hello, I had times when I woke up in the middle of the night experiencing a shortness of breath, but then I’d fell back asleep, since one week, I’m experiencing this every night, and since two days, all day long from when I wake up, I feel like it’s difficult to breathe and a sort of pressure in my chest. I talked with my doctor and she told me she thought was due my stomach acidity, reflux, she prescribe me “Omeprazol” 2 capsule x every day. To be fair, I’m bloated after I’m done eating large meals, constipated and I experience fatigue (but she doesn’t know that, she just knows I get sometimes the reflux). This week I also experienced itchy nose (just once tho), and my nose feels a bit stuffed. So I thought it might have been allergy so I picked up “Loratadine” at the pharmacy. I didn’t get any test done, I have no idea what to take now, I don’t have stomach ache or such. Right now I'm experiencing troubles with focusing and also talking, together with shortness of breath. Should I ju