Bio oil and rash?

⚓️Mila⚓️ • Baby #2 due December 4th!
I've been using bio oil since I found out I was pregnant. Never had an issue. I love the stuff! I am now 17w4d.  This morning I noticed my whole belly was covered in tiny miniature red dots, all over it. Didn't think it was because of the oil because it has never happened before. It went away in about an hour.
Tonight when I put it on, not even 5 min. later I noticed my belly started itching and surprise-same bumps, again.
Is it possible Im becoming allergic to it? What can possible cause a rash like that?