Am I Pregnant? :: Constantly Feel Bloated, Heavy And Uncomfortable

For the past two weeks or so I have been feeling very bloated and "heavy", as well as general stomach discomfort in my lower abdomen (cramping at times, sometimes sharp pains, others times very gassy). I am 36 years old, 5'8" and 120 pounds and normally have a flat stomach unless I have eaten a big meal. When I first started to experience these symptoms I initially thought I was mildly constipated - even though my bowel movements haven't changed at all, I just never feel "empty." I decided to take a laxative tea which did make me go more, but I was still very bloated afterwards. In desperation I then did a salt water flush (two teaspoons of sea salt in 34 ounces of water, which is supposed to clean out your digestive system completely), which did make me go even more, but yet I was still very bloated and heavy-feeling after.

The discomfort extends to my lower back at times, and my belly is so distended that sometimes it feels somewhat difficult to breathe. I should note that about a week or two prior to these symptoms, I had completed a 20 day juice detox where all I ingested was fresh fruit and vegetable juices. While doing the detox I felt amazing, better than I ever have in my life. I gradually went back to eating food - first raw fruits and vegetables, then cooked - but the first thing I had that was cooked (a tiny portion of vegetable soup) didn't sit well with me and upset my stomach for about a day afterwards. I have eaten normal food since but it does seem like my bloating issue started around a week or two after completing my juice detox.

I should also note that for almost a year now I have been a vegan, so I have no meat, eggs or dairy in my diet. I have never felt this way before and am at a loss of what to do. The constant heaviness and discomfort is really starting to affect my mental state, not to mention I am so afraid to eat anything at all for fear of having cramps/gas and more bloating after. I have thought about doing another juice fast to try to fix my system again, but I want to be able to eat normally like I always have. I am going to see my general doctor tomorrow but to be honest I don't have much faith in doctors. I am thinking about taking a probiotic as well, but I just don't know. I feel lost and sad by the whole situation.