Am I losing a pregnancy?

I found out my husband and I were pregnant two days ago. Two tests and no period start confirmed that. The day I found out was the day my period was supposed to start. I've been cramping and parts of my stomach are tight, is this my body just not knowing what it's supposed to do because this is a shock to me as well. Or is this serious? I can't get to a doctor this weekend (super small town) so I thought I'd try here. ❤️❤️ Any help is appreciated!