Teething or leap

My little one is cutting molars 🦷 bottom right. They are some what through but not all the way you can see them and feel them out but it’s not the whole tooth yet anyway hes been running a fever not bad and super whinny waking up more than ever in the night. I was wondering if there could be a leap on top of all this teething ?? He turnt 1 on the 29th of April. I’m a FTM so I was just wondering. Hes really been going through so much fussing and whining and just seems super uncomfortable