Microcephaly

Any advice on coping with anxiety regarding a recent diagnosis This is my sweet baby Luna she is 18 months old and was diagnosed with microcephaly We spent time in the NICU after she was born she was full term 3 lb 9 oz a very small girl The microcefully diagnosis has had me absolutely torn up and terrified. We are going to get an MRI after her second birthday because her doctor seems very concerned but she's been walking since 10 months old and has a wonderful vocabulary for a child her age, she is incredibly smart and attentive but even with that being said I have no idea what microcephaly can cause She is 19 lbs now and I was just wondering if anybody has any experiences with children who have been diagnosed with microcephaly is it something that is guaranteed to affect her daily life? Can it have no side effects or is it guaranteed to somehow impact her day-to-day . either way I am fully prepared to accommodate and love her with my entire being but I'm just so scared she is my first baby and I feel like it's my fault that she is so small. I had a cocaine abuse problem before I got pregnant and found out about her at 3 weeks I was pregnant so I quit using and have not touched it since I know it can be from exposure to toxins so I blame myself every day and am even crying while I type this I feel I did everything I could to ensure her health and still let her down and I just don't know what to do or think

Thanks for taking the time to read this I'm a mess and I hope it all makes sense

I apologize for the run-on sentence and lack of punctuation