Anyone had anything similar??

Okay so me and my partner have been taking pregnacare his and hers tablets for about a month, this month just gone (July) I haven't had no period at all I'm 10 days late on my period & I've never missed a period or been late nothing.. So this is really
Strange. I took a pregnancy test a cheap one  on Wednesday and it came up negative. In really confused? I really would love to be pregnant but I'm having no other symptoms of pregnancy and I'm too nervous to take a clear blue test as I'm worried it will come back negative and then me and my partner will be disappointed as I've never missed a period before. Help anyone ??