is this common in ASD?

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Deficits in social-emotional reciprocity, ranging, for example, from abnormal social approach and failure of normal back-and-forth conversation; to reduced sharing of interests, emotions, or affect; to failure to initiate or respond to social interactions.

Research indicates that alexithymia overlaps with autism spectrum disorders (ASD).[8][42] In a 2004 study using the TAS-20, 85% of the adults with ASD fell into the impaired category; almost half of the whole group fell into the severely impaired category. Among the normal adult control, only 17% was impaired; none of them severely.[42][43] Fitzgerald & Bellgrove pointed out that, "Like alexithymia, Asperger's syndrome is also characterised by core disturbances in speech and language and social relationships".[44] Hill & Berthoz agreed with Fitzgerald & Bellgrove (2006) and in response stated that "there is some form of overlap between alexithymia and ASDs". They also pointed to studies that revealed impaired theory of mind skill in alexithymia, neuroanatomical evidence pointing to a shared etiology and similar social skills deficits.[45] The exact nature of the overlap is uncertain. Alexithymic traits in AS may be linked to clinical depression or anxiety;[43] the mediating factors are unknown and it is possible that alexithymia predisposes to anxiety

I have a hard time recognizing subtle emotions in myself, i only know im sad when im in tears, i only know im mad when im yelling and i only know im happy when im laughing. other than that im just guessing.