Losing weight and belly is getting bigger 😫...

So the other day i was home n i decide to see how much my weight was... I have been in 215 for the last 3 monts but the thingy said i was 205. I thought the thing was broken bcause my belly doesnt look like i lose 10 more pounds. Anyways yesterday I whent to GNC n did the same thing & my weight was 206 i was surprised but i was happy... So today while i was taking a shower i looked at my belly n i was like "waaaait a min..." My stomach is getting bigger n harder for saying like that & also the linea nigra is showing up. I cant be pregnant cause i had my period a week ago. 
Does anyone have or had the same problem?? Please respond ❤️