Possible early symptoms??

Je
I am 10dpo -- haven't tested yet, waiting until the weekend. Since O day, I've had some menstrual like cramps..they got worse as the days went on. At 7-8 DPO I had some brownish spotting. Yesterday and today I've been feeling very fatigued. Also this morning I noticed a very heightened sense of smell. Could these possibly be early symptoms?!