If you have had serious issues with major unipolar depression and/or bi-polar depression in the past, this can be a challenging time for you because your hormones are all out of whack which can trigger lots of feelings (good an bad). One of the problems with being obese is that fat cells produce and store estrogen. As you burn those cells off, the estrogen is being released into your blood stream. This will throw off your hormonal balance in a major way. [This effects both men and women btw]. It will cause mood swings and can make you downright irritable--like super PMS.
If you're unhappy with your p.doc in general, by all means get a new one. If, however, this is just a concern about your current mood, try to get an appointment as soon as possible, but don't look to change docs right now if he or she has been doing a good job for you in general. It's hard to find a good p.doc and there aren't many (or any) p.docs that specialize in treating bariatric patients (we aren't really all that different from any other patient once our bodies adapt to the new physiology). You should, however, go to your bariatric support group meetings. My practice has them twice a month. It's a great way to meet other people that are going through the same things you're going through (or have been them already). Try to get that appointment to see your p.doc, but if he or she has been doing a good job for you so far, don't run out and change. New docs often like to change up meds and that can really add fuel to the fire.
This hormonal spike is going to be a short term issue (a few months at the most)--not a life long thing. So, you are only talking about dealing with unusual emotions for a little while--and then you get back to being yourself (with all the usual issues that you had before surgery, but with less weight to carry around). If have issues with major depression and you feel yourself slipping into a downward spiral, you might also look into seeing a doctor or clinic that could give you ketamine infusion. That would definitely take the edge off while you go through the adjustment phase. My wife suffers with major depression (has for years) and she gets ketamine treatments every 3-4 weeks depending on what's going on. It's not a cure all, but it makes a huge difference!!!