I'm 6 days in to a 7 day course of flucloxacillin for mastitis and I feel crap. I think I'm going to have to stop taking them. Feel like I've had a migraine for 5 days! Also my stomach is god awful with the runs and nausea. Keep getting random pains everywhere too. It's more than I can handle right now. I've been on a lot of antibiotics recently for other issues and it feels like they are wrecking my health. Has anyone else had this? I feel so out of it and it's making me panic somewhat.