Testosterone Injections

I've been a bit inconsistent with my injections, I do them at home with my fiance. I take 0.5 ml once a week and I was a day late this week and immediately started menstruating.

I started taking T almost 3 years ago.

Is this normal for missing a dose? Should I see about going to a clinic to get them done weekly? Will the hormones damage my body if they're inconsistent?

(I also am iron and b12 deficient if that's relevant)