Just started charting, weird dream, and question

So hubby and I decided last month to stop using protection (we were using condoms) and "see what happens." Well I decided that wasn't quite good enough. Haha
I bought a basel temp thermometer and printed off the graph to keep track. I started keeping track of my temps last week (with hubby's support.) I have PCOS, so I thought it would be educational to see if I even ovulate.
I've been getting my period about once every 3 months lately. I got my last period on May 21st. If I had a normal period, I would have ovulated and had sex at the same time this month. This is the first month I feel where its actually possible I could get pregnant. We only had unprotected sex one time last month and then I got my period.
So, I don't know if its just my brain or what... but last night I woke up in the middle of the night and my boobs hurt really bad, almost burning, and I was cramping. I think I was coming out of a dream because I was totally convinced I was pregnant!
I keep touching my boobs today to see if they still hurt. They are a little sensitive and I have been cramping a bit the last few days... It would be SO unlikely for me to get pregnant this quickly and easily given my PCOS and lack of normal periods. I am trying not to get too emotionally invested. 

So here's a question: My OB/GYN said when I started actively trying, if I didn't get pregnant for awhile, to come back and she would put me on metformin. She did not elaborate on what "awhile is." I am 28 years old. What should I do? Try for a few months like I am now, or be more proactive? I am still very overweight despite the band, and am not seeking a revision (long story). My OBGYN is supportive of me TTC at my current weight. I am trying to eat healthier etc. to lose a little as I go. I am not planning on getting to a certain number or anything anymore. I am fully planning on being a fat, pregnant woman, so please don't try to change that. It has taken a long time for me to get where I am emotionally. I do believe a person can be fat and healthy and happy. 
Thanks for the advice,
Nikki

Good luck to you! I just wanted to say that both times I had dreams where I was pregnant, I actually WAS pregnant. I guess it was my subconsious talking to me saying, pee on a stick!

Ditto what Tami said.  The night before I got my positive preg test I had a dream that I was holding 3 positive pregnancy tests.  The next day I took one that was SO faint, I took another, then a digital.  That made three positive tests lol! good luck!