Help/ideas!!!

We thought we were done! More he was done, and I was open to one more (we have 3 babies already), but didn’t want to start trying until next summer since our youngest is still a baby. But, I think I’m pregnant again!!! Our others were planned and took a lot to get pregnant. We were preventing but obviously things happen. Test this morning was a very faint positive. Going to test again in a few day. Ideas on how to tell my husband when I know he isn’t going to be thrilled?