Pregnant????i hope:)?

my period is usually 1 week long and a heavy flo. when i got it, it was only a 3 days thing. when i first started it it was one light flo then for the next to days spotting. these are the symptoms i have been getting. Peeing a lot. ive been getting headaches. My stomach is getting harder. Eating more than normal. getting some cramps. Ive been having a lot of mood swings. & the weirdest thing of all is about a month ago i was loosing a lot of my Weight. and now im gaining it all back with no problem right when all this symptoms started to happen. what is the chance i might be pregnant. and if you could tell me when the best time to try to get pregnant it. ive been trying for a while and this is the first time i have got these symptoms.& i also ive been getting gas and burping a lot.*and ive been getting this discharge its a clearish white.