Welb symptoms and conditions

Been on Welb for about a month now and it seems as if a few side effects are getting stronger instead of diminishing. The headaches are seeming to get stronger and are there the whole of the day. Just like a tight band around the top of my head. Also my ears are constantly singing like a little electric zzzzsss. Also I have found that I react much snappier and very quickly ticked off byt the slightest things. Haven't really got rid of the depressive thoughts completely as yet and am thinking of calling the Dr on Monday as the headache is really tiring.

I have been on Welbutrin XL 300mg for 3 days now. I switched from Lexapro, which I was on for 2 years, because of weight gain...over 30 lbs in the last 2 years. I am a very active person and have a very active job. This prompted me to talk with the doctor about my weight gain. He recommended the Welbutrin XL, which I take one pill at night before I go to bed. I have been VERY edgy ever since I started it. I dont know if it is withdrawl from Lexapro or switching to Welb. I have also had the common headache all day every day since I started...if anyone has any clues, please post!
Thanks