Surprise feels ruined!!!

so far this month I have yet to get my period. Now I did see some slight bleeding in clear stuff and had some brown goop which I know is just dry blood. This was days ago and to be honest I can't remember when. Any how my husband knows my period and hes been asking every day if I got it. Also asking for sex and frankly my head is just on the question am I pregnant. I haven't been able to go out and get a test. So I don't know.....last night he kept asking and pushing why can't we have sex. And I don't want to explain cause I feel like that would ruin the suprise if i am. And i ended up crying and telling him that I want to suprise him if I am and him asking questions is ruining it. Well, bc of my crying he didn't get all of what I was saying so yet again he asks and pushes for answers and top it all off iv been nauseous all day and my whole body just hurts.....feels like my abs are burning and cramping and heavy. Same goes for my back. So i absolutely dony feel like it. But if i tell him all this.....I just feel like at this point I can't surprise him when I finally do take the test. Anyway to save it?