My boyfriend has a draft cross and he recently wormed her, well when we went out to see her the other morning she has a tubular swelling just behind her girth line and it's on both sides but isn't swollen in the middle, I'm guessing that's where her ribs come together? But the swelling is on both sides of her belly, just behind the girth line but on the bottom of her belly. Anyone know what it is? She seemed upset the past day or two and is nervous. She also didn't eat an apple and some of her hay which is very odd for her but she did eat some grain. She also seems to be going to the bathroom normally and has her energy still and seems a bit like herself but I know last night she was very edgy and nervous... Maybe she's in heat? It's a standardbred/ Draft cross mare about 17hh. I'm kinda worried and I know he is too and we didn't know if maybe it was the wormer, he used ivercare, or if she was colicy, or in heat maybe? Idk any ideas?