Do You Think I Could Be Pregnant?

My husband and I have been trying to get pregnant. About a month ago I had my annual and a neg pt. My cycle has been really irregular, but the dr wanted to wait to see if I could get pregnant before he treated that. Well, my cycle has been 14 days for a couple of months, every 2 weeks I have a period. I am going on 19 days now, and nothing. My last period was extremely light, which was not normal. My stomach has been really sensitive, I don't like any pressure on it. My bbt is usually irregular too, however, it has been an even 97.5 for the last five days. It usually goes up and down between 97 and 97.9 on a daily basis. Could I just be getting regular, or do you think I could be pregnant. I have been having other symptoms, like a light heartburn feeling, my bm have even changed. Pregnant? Getting regular? Help!!!!