I'm on week 3 of 150 mg of Wellbutrin.I switched to it from Effex...

I'm on week 3 of 150 mg of Wellbutrin.I switched to it from Effexor, which caused me to gain 40 pounds.The first week on Wellb I noticed increased energy, trouble staying asleep at night, mood improvement. Now in week 3, the sleep has improved, I've managed to quit smoking (works great for this), and I lost 5 pounds. On the downside, frequent urination, some stomach issues, mild headachey feeling, sensitivity to light, feeling overheated sometimes, and some return of depressive symptoms after initial burst of energy and motivation. What scares me the most though is reading about all the reports of hair loss on here. I have fine hair to begin with ad there is no way I can endure this side effect. So far I haven't noticed that effect, but I'm considering ditching this drug if that is a serous risk. From reading all the reports I'm wondering if there are more reports of hair loss from people on 300 mg or more than from people on 150 mg??