PMS all month affecting love life

i feel like i only have one pretty good week where i feel secure in my relationship. otherwise, i constantly feel like he’s gonna get tired of me or he’s gonna get angry with me. i’ve never met someone so perfect for me but i’m still scared. does anyone else get this way? period supposed to start in 6 days (btw i was unmedicated for hypothyroidism for a while so hormones may be off) please help.