Ask your Rav
This is definitely the only option. Dont take advice off anyone in a blog, even if they are a great talmid chochom and tremendous outstanding anav such as myself.
But I do believe you are confusing sefira with the 3 weeks where the aveilus is completely different. There is no problem in sefira eg to make shehechiyanu if you happen to come across a new food that you didnt set out to get. The halachos that we have are more to remind us of rabbi akiva’s talmidim and that these are special days of reflection. There are no issues of sakana or bad mazal in sefira.
Had it been considered proper aveilus, there would be no heter for someone to attend a chasuna during the half of sefira that they keep. But you ask your Rav.