Questions about Just starting Effexor Xr?

I am a 24 year old mother of 2, who was just prescribed Effexor xr for depression/anxiety/mood swings. I am taking 37.5 mg for 1 week, then moving to 75 mg from there. I have been on Effexor xr before, and I really liked It, but I was only 16 at the time. Quite a few years have ped since I've taken any type of anti depressants. I have been on prozac, zoloft, effexor, celexa, paxil, ritalin, and staterra all at least 6 or 7 years ago. I am worried about weight gain from effexor, that and I am not seeing ANY good reviews on this product. So far, I am a little tired, but won't side effects be different the first week? I do believe that the reviewers who say they gained 50 plus pounds on this, it isn't the pill, it is because they are lazy, and overeat, period. Does anyone have reviews of their own? I will mention that I lost weight the first time, and was never a better person than I was then. Thanks in advance.