No normal pms symptoms

This is my very first post and I’m sure that as soon as I hit post AF will come. My fiancée and I aren’t trying but aren’t preventing either. I have a very regular cycle (about 28 days) and usually at this point in my cycle my boobs hurt so bad. I’m about 13 DPO and have had the flu the last couple days (fever, chills, headache, sore throat). I took a FRER yesterday morning and it was negative. AF is due Monday. I usually cramp a couple days before and this month - nothing. Does anyone think the flu could be affecting my pms symptoms or did I maybe test too early? Any input would be greatly appreciated!