Sick during 2ww

Has anyone been sick during their 2WW and come out with a positive result? 
​I ovulated last Tuesday, cd19 and about 4dpo started feeling cramps, a sort of pulling/twinge on and off. That day I also woke up stuffy with a sore throat which turned into a full blown awful flu. 
​I have still been having cramps up until yesterday, breast are full and sore, peeing every 10 minutes and have been exhausted. I'm not sure if this all because of the flu or if I could be pregnant and with the flu. I know your immune system gets weaker when you first come pregnant.
​I have also been taking medicine to get rid of this illness - if I am pregnant will this be a major issue?? 
​I would appreciate any advice.