It is not recommended that you continue to take tetracyclines if you wish to become pregnant.
A short course of topical medications such as benzoyl peroixide or reti noic acidgel is recommended.
There are certain other blood tests such as complete blood count
, Vit B12 levels, Ferritin levels, Antinuclear antibody, TSH
that can help understand why you are losing hair.
Please stop taking antibiotics if you wish to get pregnant.