Stomach pain!!! 😡

Lately I have been having low abdominal pains & some days it feels harder than others to breathe.. I don’t even want to consider that I may be pregnant because If I start thinking that way than the symptoms will come without actually a chance of being pregnant! I’m going to the doctor tomorrow morning but I just do not know what to take, do, eat, all that! If anyone can please give advice or maybe they’ve been through this too, let me know!!!