Larger belly after adding some strength training?

Hi everyone,

I've been trying to lose weight for about a month now. I eat about 1500 calories a day and started the 30 day shred 3 weeks ago. To be honest, I haven't really noticed much improvement (except for a 5 lb loss when I first started restricting) but I've come to terms with the fact that I guess I'll just have to lose the weight in a slow manner since I don't have tooooo much to lose in the first place. I'm at 155 right now and want to get to 135, I'm also 5'6.5 and 21. My question is, while I haven't necessarily noticed any positive changes, my stomach has seeme larger recently. When I first started on this journey, as long as I stayed within my calorie limit, my stomach looked smaller and flatter the next day. Ever since I started the shred, though, it's been looking very large (albeit firmer and less jiggly) and it protrudes much more than before. The 30 day shred has a lot of ab exercises, but I expected it to make my belly smaller, if anything, not larger. Does any have any possible explanations for this?? Is it normal?? Thanks for your help!!!!!