Ttc since 10 months wid no luck

falak

Today is cd 21 and 7th or 8th dpo not sure, cervix is low to medium am confused it's closed sumtyms and sumtym I can insert d tip of ma finger, having occasionally sore boobs, blocked nose fatigue dry mouth and a kind of dull feeling in lower abdomen, periods are not due till 5 days, could this be sign of af or anything else, when I put a finger n swipe found diz kind of cm is it a sign of upcoming period or am I pregnant confused