TMI! Could I be pregnant??

my period is supposed to come tomorrow (March,28) like every month right, but I’ve been trying to conceive for 3 months so this whole month , I’ve been having sex as much as possible. so I’ve been having sharp pain on my abdomen and also this discharge. I’m hoping to get my BFP and no AF! But this discharge though, does anyone know what it could be?? Yesterday it was completely clear and tad bit less stretchy like today. I took a pregnancy test yesterday but it was negative , could it being digital be an issue also?