I had the same last week, I'd been losing very well and then had a week of a small gain (0.2lb) yet still strong suppression and eating below maintenance level so it felt unwarranted. I also felt like the blood sugar benefits were reduced, feeling a bit shaky and off.
I opted to move up to 3.75mg, this resulted in rapid losses straight away, not a lot of difference in suppression (it couldn't really get much stronger anyway), However I've had a bit of an upset stomach since Monday.
I've decided to continue at 3.75mg and see how it goes this week. Weekly weigh in tomorrow but its been a strong week, even taking into account the ejector stomach
I hope your next week feels better