Can I be PG???

Nadine • Love my BoyZ 2 the moon and back😍
I feel realy stupid for even asking this and thinking it. 
I started my AF on the 21st last month, it ended on the 25th. 1 week prior to that I had real bad nipple sensitivity and nauseous and verry moody,going to the loooo a lot. So then AF and I kinda thought that cycle was lost......but nog cycle day 13 i have been nauseous since yesterday and verry bad lower back pain cramps headaces and i am moody al over again. 
Do you guys tink it can be possible. 
We are TTC hard since our MC...dont want to get my hopes up.