Some thoughts
1) how accurate is your libre? It works well for many but for others it can be drastically (several mmol/L) out. Do some checks with an old fashioned glucometer. I'm not the best person to talk about this, but I believe it can be made significantly more accurate (plus give you hypo and hyper alerts) by adding a miao miao transmitter and using the xdrip app. (The libre is completely inaccurate for me, plus I'm allergic to it.)
2) Basal. How confident are you that this is right? Your clinic should go over this with you.
3) Injection sites. If you inject into an overused site (lumpy fat/lipohytrophy (probably got the spelling wrong)) this can mess everything up.
Talk to your clinic. Do you have a number to call? They are supposed to help you. The hypos may well be causing the hypers as it's very hard not to overtreat them.
Good luck. Try not to panic over your levels. T1s have been having successful pregnancies for more than half a century, before the libre or even glucometers were available.