thanks for your query
As you said you had misscarriage once and tubal pregnancy
once and tubectomy done for that.
First of all you have not mentioned your age,that is very important.
I will suggest this for you -
1) Not plan pregnancy for at least 1yrs.
2)Do not worried about getting pregnant or not,stay calm.
3)Take folic acid
when you are planning for pregnancy at least for three months,before you concieve.
4)One tube is more than sufficient to getting pregnant.
5)When you had abortion
,your all test was done?
6)Are you treated for your abortion.
Everthing will be fine,you will definetely get pregnant,GOD bless you.