In-laws and first grandchild

There's something that makes it very hard for me to leave my son with my in-laws, even having them come to visit just gives me anxiety. My son is 6 months and is the first grandchild on both sides. My husband and I have been married for 3+ years. I have never cared for my in-laws and part of me knows they don't care about me. My MIL won't text me at all she will always go through my husband even if it's something that I need to answer. Even in their presence they hardly say anything to me. I'm not sure if I have anxiety because I've never seen them with babies or if it's just me freaking out. I really don't know how to become ok with it either. Any suggestions? ***********Edit************ I have let them babysit while we go for dinner. It's not that I don't necessarily trust them just leaving him with them I just get very anxious. He's my baby and I just want to keep him to myself. I understand I need to share so how do I help myself get over this