Could i be pregnant?

Eve • 26.from liverpool uk First time mum
My and my SO did the deed multiple time during my fertile week (19 days ago) im now late by 4 days. My boobs are sore and my nipples you cant even touch. Getting head aches more frequently ( suffer from IIH anyway ) and i just cant seem to get enough sleep. He's telling me to do a test but im too scared to. Im just putting it down to being late (i have been quite stressed recently with being suspended from work then sacked (not my fault) so trying to get that sorted and get a new job)